| Base | Representation |
|---|---|
| bin | 10010110100001000… |
| … | …10010111010111101 |
| 3 | 222001221211110221112 |
| 4 | 21122010102322331 |
| 5 | 131141324310414 |
| 6 | 4350151411405 |
| 7 | 505212112031 |
| oct | 113204227275 |
| 9 | 28057743845 |
| 10 | 10101010109 |
| 11 | 4313836443 |
| 12 | 1b5a983b65 |
| 13 | c4c8c5978 |
| 14 | 6bb7381c1 |
| 15 | 3e1bb1d3e |
| hex | 25a112ebd |
10101010109 has 4 divisors (see below), whose sum is σ = 10632642240. Its totient is φ = 9569377980.
The previous prime is 10101010079. The next prime is 10101010163. The reversal of 10101010109 is 90101010101.
It is a happy number.
10101010109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90101010101 = 9803 ⋅9191167.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-10101010109 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 10101010093 and 10101010102.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10101010189) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265816037 + ... + 265816074.
It is an arithmetic number, because the mean of its divisors is an integer number (2658160560).
Almost surely, 210101010109 is an apocalyptic number.
10101010109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.
It is an amenable number.
10101010109 is a deficient number, since it is larger than the sum of its proper divisors (531632131).
10101010109 is an equidigital number, since it uses as much as digits as its factorization.
10101010109 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 531632130.
The product of its (nonzero) digits is 9, while the sum is 14.
The spelling of 10101010109 in words is "ten billion, one hundred one million, ten thousand, one hundred nine".
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