13212311231331 has 24 divisors (see below), whose sum is σ = 20091754912320. Its totient is φ = 8343429353136.

The previous prime is 13212311231309. The next prime is 13212311231333. The reversal of 13212311231331 is 13313211321231.

13212311231331 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 2 + 311 + 2 + 313 + 31 = 666.

It is not a de Polignac number, because 13212311231331 - 2²³ = 13212302842723 is a prime.

It is a super-2 number, since 2×13212311231331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13212311231295 and 13212311231304.

It is not an unprimeable number, because it can be changed into a prime (13212311231333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4296105 + ... + 6699338.

It is an arithmetic number, because the mean of its divisors is an integer number (837156454680).

Almost surely, 2^{13212311231331} is an apocalyptic number.

13212311231331 is a deficient number, since it is larger than the sum of its proper divisors (6879443680989).

13212311231331 is a wasteful number, since it uses less digits than its factorization.

13212311231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11002495 (or 11002492 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 13212311231331 its reverse (13313211321231), we get a palindrome (26525522552562).

The spelling of 13212311231331 in words is "thirteen trillion, two hundred twelve billion, three hundred eleven million, two hundred thirty-one thousand, three hundred thirty-one".