21931101059 has 12 divisors (see below), whose sum is σ = 26620894224. Its totient is φ = 17980777584.

The previous prime is 21931101053. The next prime is 21931101077. The reversal of 21931101059 is 95010113912.

It is not a de Polignac number, because 21931101059 - 2⁸ = 21931100803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21931101053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9728732 + ... + 9730985.

It is an arithmetic number, because the mean of its divisors is an integer number (2218407852).

Almost surely, 2^21931101059 is an apocalyptic number.

21931101059 is a deficient number, since it is larger than the sum of its proper divisors (4689793165).

21931101059 is a wasteful number, since it uses less digits than its factorization.

21931101059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19459754 (or 19459747 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 32.

The spelling of 21931101059 in words is "twenty-one billion, nine hundred thirty-one million, one hundred one thousand, fifty-nine".