13131123110021 has 32 divisors (see below), whose sum is σ = 15403009628160. Its totient is φ = 10959853738176.

The previous prime is 13131123109997. The next prime is 13131123110069. The reversal of 13131123110021 is 12001132113131.

It is not a de Polignac number, because 13131123110021 - 2⁶ = 13131123109957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13131123109975 and 13131123110002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131123110321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1070262275 + ... + 1070274543.

It is an arithmetic number, because the mean of its divisors is an integer number (481344050880).

Almost surely, 2^{13131123110021} is an apocalyptic number.

It is an amenable number.

13131123110021 is a deficient number, since it is larger than the sum of its proper divisors (2271886518139).

13131123110021 is a wasteful number, since it uses less digits than its factorization.

13131123110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22913.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 13131123110021 its reverse (12001132113131), we get a palindrome (25132255223152).

The spelling of 13131123110021 in words is "thirteen trillion, one hundred thirty-one billion, one hundred twenty-three million, one hundred ten thousand, twenty-one".