331220212113231 has 40 divisors (see below), whose sum is σ = 565594896451200. Its totient is φ = 189226696791312.

The previous prime is 331220212113227. The next prime is 331220212113239. The reversal of 331220212113231 is 132311212022133.

331220212113231 is a `hidden beast` number, since 3 + 3 + 12 + 202 + 1 + 211 + 3 + 231 = 666.

It is not a de Polignac number, because 331220212113231 - 2² = 331220212113227 is a prime.

It is a super-2 number, since 2×331220212113231² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 331220212113195 and 331220212113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220212113239) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62250681 + ... + 67361618.

It is an arithmetic number, because the mean of its divisors is an integer number (14139872411280).

Almost surely, 2^{331220212113231} is an apocalyptic number.

331220212113231 is a deficient number, since it is larger than the sum of its proper divisors (234374684337969).

331220212113231 is a wasteful number, since it uses less digits than its factorization.

331220212113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129616825 (or 129616816 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 331220212113231 its reverse (132311212022133), we get a palindrome (463531424135364).

The spelling of 331220212113231 in words is "three hundred thirty-one trillion, two hundred twenty billion, two hundred twelve million, one hundred thirteen thousand, two hundred thirty-one".