39112000021 has 4 divisors (see below), whose sum is σ = 39112480044. Its totient is φ = 39111520000.

The previous prime is 39112000007. The next prime is 39112000049. The reversal of 39112000021 is 12000021193.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12000021193 = 71 ⋅169014383.

It can be written as a sum of positive squares in 2 ways, for example, as 26272843921 + 12839156100 = 162089^2 + 113310^2 .

It is a cyclic number.

It is not a de Polignac number, because 39112000021 - 2²⁷ = 38977782293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39112000091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83980 + ... + 292021.

It is an arithmetic number, because the mean of its divisors is an integer number (9778120011).

Almost surely, 2^39112000021 is an apocalyptic number.

It is an amenable number.

39112000021 is a deficient number, since it is larger than the sum of its proper divisors (480023).

39112000021 is a wasteful number, since it uses less digits than its factorization.

39112000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480022.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 39112000021 in words is "thirty-nine billion, one hundred twelve million, twenty-one", and thus it is an aban number.