21211011675923 has 2 divisors, whose sum is σ = 21211011675924. Its totient is φ = 21211011675922.

The previous prime is 21211011675877. The next prime is 21211011675961. The reversal of 21211011675923 is 32957611011212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211011675923 - 2²² = 21211007481619 is a prime.

It is a super-2 number, since 2×21211011675923² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21211011675823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605505837961 + 10605505837962.

It is an arithmetic number, because the mean of its divisors is an integer number (10605505837962).

Almost surely, 2^{21211011675923} is an apocalyptic number.

21211011675923 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211011675923 is an equidigital number, since it uses as much as digits as its factorization.

21211011675923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 21211011675923 in words is "twenty-one trillion, two hundred eleven billion, eleven million, six hundred seventy-five thousand, nine hundred twenty-three".