Base | Representation |
---|---|
bin | 10011110110010100… |
… | …000000111101010011 |
3 | 2001000021212120200102 |
4 | 103312110000331103 |
5 | 322121422423443 |
6 | 13442444443015 |
7 | 1353065440565 |
oct | 236624007523 |
9 | 61007776612 |
10 | 21312311123 |
11 | 9047275874 |
12 | 416954946b |
13 | 20185333ac |
14 | 10626cd335 |
15 | 84b08dcb8 |
hex | 4f6500f53 |
21312311123 has 2 divisors, whose sum is σ = 21312311124. Its totient is φ = 21312311122.
The previous prime is 21312311093. The next prime is 21312311161. The reversal of 21312311123 is 32111321312.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 21312311123 - 216 = 21312245587 is a prime.
It is a super-2 number, since 2×213123111232 (a number of 21 digits) contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 21312311095 and 21312311104.
It is not a weakly prime, because it can be changed into another prime (21312311183) 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 as a sum of consecutive naturals, namely, 10656155561 + 10656155562.
It is an arithmetic number, because the mean of its divisors is an integer number (10656155562).
Almost surely, 221312311123 is an apocalyptic number.
21312311123 is a deficient number, since it is larger than the sum of its proper divisors (1).
21312311123 is an equidigital number, since it uses as much as digits as its factorization.
21312311123 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 216, while the sum is 20.
Adding to 21312311123 its reverse (32111321312), we get a palindrome (53423632435).
The spelling of 21312311123 in words is "twenty-one billion, three hundred twelve million, three hundred eleven thousand, one hundred twenty-three".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.066 sec. • engine limits •