12312012113021 has 4 divisors (see below), whose sum is σ = 12424966352700. Its totient is φ = 12199057873344.

The previous prime is 12312012112987. The next prime is 12312012113039. The reversal of 12312012113021 is 12031121021321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6793247980996 + 5518764132025 = 2606386^2 + 2349205^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312012113021 - 2¹⁸ = 12312011850877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312012112984 and 12312012113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312012193021) 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, 56477119676 + ... + 56477119893.

It is an arithmetic number, because the mean of its divisors is an integer number (3106241588175).

Almost surely, 2^{12312012113021} is an apocalyptic number.

It is an amenable number.

12312012113021 is a deficient number, since it is larger than the sum of its proper divisors (112954239679).

12312012113021 is a wasteful number, since it uses less digits than its factorization.

12312012113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112954239678.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12312012113021 its reverse (12031121021321), we get a palindrome (24343133134342).

The spelling of 12312012113021 in words is "twelve trillion, three hundred twelve billion, twelve million, one hundred thirteen thousand, twenty-one".