31322120331231 has 24 divisors (see below), whose sum is σ = 48398279346144. Its totient is φ = 19450485872640.

The previous prime is 31322120331223. The next prime is 31322120331233. The reversal of 31322120331231 is 13213302122313.

31322120331231 is a `hidden beast` number, since 3 + 1 + 3 + 221 + 203 + 3 + 1 + 231 = 666.

It is not a de Polignac number, because 31322120331231 - 2³ = 31322120331223 is a prime.

It is a super-2 number, since 2×31322120331231² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31322120331195 and 31322120331204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322120331233) 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, 1055241555 + ... + 1055271236.

It is an arithmetic number, because the mean of its divisors is an integer number (2016594972756).

Almost surely, 2^{31322120331231} is an apocalyptic number.

31322120331231 is a deficient number, since it is larger than the sum of its proper divisors (17076159014913).

31322120331231 is a wasteful number, since it uses less digits than its factorization.

31322120331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110512911 (or 2110512908 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31322120331231 its reverse (13213302122313), we get a palindrome (44535422453544).

The spelling of 31322120331231 in words is "thirty-one trillion, three hundred twenty-two billion, one hundred twenty million, three hundred thirty-one thousand, two hundred thirty-one".