331131311121331 has 16 divisors (see below), whose sum is σ = 386159833382400. Its totient is φ = 283826198672520.

The previous prime is 331131311121311. The next prime is 331131311121367. The reversal of 331131311121331 is 133121113131133.

It is not a de Polignac number, because 331131311121331 - 2⁷ = 331131311121203 is a prime.

It is a super-2 number, since 2×331131311121331² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331131311121331.

It is not an unprimeable number, because it can be changed into a prime (331131311121311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212374080 + ... + 213927586.

It is an arithmetic number, because the mean of its divisors is an integer number (24134989586400).

Almost surely, 2^{331131311121331} is an apocalyptic number.

331131311121331 is a deficient number, since it is larger than the sum of its proper divisors (55028522261069).

331131311121331 is an equidigital number, since it uses as much as digits as its factorization.

331131311121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174959 (or 2174945 counting only the distinct ones).

The product of its digits is 1458, while the sum is 28.

Adding to 331131311121331 its reverse (133121113131133), we get a palindrome (464252424252464).

The spelling of 331131311121331 in words is "three hundred thirty-one trillion, one hundred thirty-one billion, three hundred eleven million, one hundred twenty-one thousand, three hundred thirty-one".