Base | Representation |
---|---|
bin | 11101101011111010111… |
… | …01010111110110011101 |
3 | 10121111211101201111012202 |
4 | 32311331131113312131 |
5 | 113202441044213041 |
6 | 2100330451141245 |
7 | 133456564542614 |
oct | 16657535276635 |
9 | 3544741644182 |
10 | 1020012101021 |
11 | 36364826a661 |
12 | 145827ba4825 |
13 | 7525731c434 |
14 | 3752419c87b |
15 | 1b7ed5c2a9b |
hex | ed7d757d9d |
1020012101021 has 4 divisors (see below), whose sum is σ = 1029915131232. Its totient is φ = 1010109070812.
The previous prime is 1020012100973. The next prime is 1020012101027. The reversal of 1020012101021 is 1201012100201.
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.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1020012101021 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1020012100993 and 1020012101011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1020012101027) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4951514951 + ... + 4951515156.
It is an arithmetic number, because the mean of its divisors is an integer number (257478782808).
Almost surely, 21020012101021 is an apocalyptic number.
It is an amenable number.
1020012101021 is a deficient number, since it is larger than the sum of its proper divisors (9903030211).
1020012101021 is an equidigital number, since it uses as much as digits as its factorization.
1020012101021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9903030210.
The product of its (nonzero) digits is 8, while the sum is 11.
Adding to 1020012101021 its reverse (1201012100201), we get a palindrome (2221024201222).
It can be divided in two parts, 102001 and 2101021, that added together give a palindrome (2203022).
The spelling of 1020012101021 in words is "one trillion, twenty billion, twelve million, one hundred one thousand, twenty-one".
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