13320440121231 has 12 divisors (see below), whose sum is σ = 19241015225640. Its totient is φ = 8880118262640.

The previous prime is 13320440121193. The next prime is 13320440121257. The reversal of 13320440121231 is 13212104402331.

13320440121231 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 0 + 4 + 401 + 21 + 231 = 666.

It is not a de Polignac number, because 13320440121231 - 2⁹ = 13320440120719 is a prime.

It is a super-2 number, since 2×13320440121231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13320440121195 and 13320440121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320440121271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14113465 + ... + 15027666.

It is an arithmetic number, because the mean of its divisors is an integer number (1603417935470).

Almost surely, 2^{13320440121231} is an apocalyptic number.

13320440121231 is a deficient number, since it is larger than the sum of its proper divisors (5920575104409).

13320440121231 is a wasteful number, since it uses less digits than its factorization.

13320440121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29191926 (or 29191923 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 13320440121231 its reverse (13212104402331), we get a palindrome (26532544523562).

The spelling of 13320440121231 in words is "thirteen trillion, three hundred twenty billion, four hundred forty million, one hundred twenty-one thousand, two hundred thirty-one".