21112099975 has 12 divisors (see below), whose sum is σ = 26200343160. Its totient is φ = 16875912800.

The previous prime is 21112099969. The next prime is 21112100017. The reversal of 21112099975 is 57999021112.

It is not a de Polignac number, because 21112099975 - 2²³ = 21103711367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312841 + ... + 374290.

It is an arithmetic number, because the mean of its divisors is an integer number (2183361930).

Almost surely, 2^21112099975 is an apocalyptic number.

21112099975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21112099975 is a deficient number, since it is larger than the sum of its proper divisors (5088243185).

21112099975 is a wasteful number, since it uses less digits than its factorization.

21112099975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688370 (or 688365 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 46.

The spelling of 21112099975 in words is "twenty-one billion, one hundred twelve million, ninety-nine thousand, nine hundred seventy-five".