13031232121231 has 4 divisors (see below), whose sum is σ = 13031284617000. Its totient is φ = 13031179625464.

The previous prime is 13031232121213. The next prime is 13031232121241. The reversal of 13031232121231 is 13212123213031.

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

It is a cyclic number.

It is not a de Polignac number, because 13031232121231 - 2⁹ = 13031232120719 is a prime.

It is a super-2 number, since 2×13031232121231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031232121196 and 13031232121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031232121241) 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, 25873756 + ... + 26372593.

It is an arithmetic number, because the mean of its divisors is an integer number (3257821154250).

Almost surely, 2^{13031232121231} is an apocalyptic number.

13031232121231 is a deficient number, since it is larger than the sum of its proper divisors (52495769).

13031232121231 is an equidigital number, since it uses as much as digits as its factorization.

13031232121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52495768.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13031232121231 its reverse (13212123213031), we get a palindrome (26243355334262).

The spelling of 13031232121231 in words is "thirteen trillion, thirty-one billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred thirty-one".