21112967057 has 16 divisors (see below), whose sum is σ = 26475482880. Its totient is φ = 16389577152.

The previous prime is 21112967039. The next prime is 21112967059. The reversal of 21112967057 is 75076921112.

It is not a de Polignac number, because 21112967057 - 2¹⁸ = 21112704913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112967059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2183957 + ... + 2193602.

It is an arithmetic number, because the mean of its divisors is an integer number (1654717680).

Almost surely, 2^21112967057 is an apocalyptic number.

It is an amenable number.

21112967057 is a deficient number, since it is larger than the sum of its proper divisors (5362515823).

21112967057 is a wasteful number, since it uses less digits than its factorization.

21112967057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4377632.

The product of its (nonzero) digits is 52920, while the sum is 41.

The spelling of 21112967057 in words is "twenty-one billion, one hundred twelve million, nine hundred sixty-seven thousand, fifty-seven".