331121011131 has 16 divisors (see below), whose sum is σ = 490742196000. Its totient is φ = 220660693344.

The previous prime is 331121011127. The next prime is 331121011139. The reversal of 331121011131 is 131110121133.

331121011131 is a `hidden beast` number, since 3 + 311 + 210 + 11 + 131 = 666.

It is not a de Polignac number, because 331121011131 - 2² = 331121011127 is a prime.

It is a super-2 number, since 2×331121011131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331121011139) 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, 2336776 + ... + 2474421.

It is an arithmetic number, because the mean of its divisors is an integer number (30671387250).

Almost surely, 2^331121011131 is an apocalyptic number.

331121011131 is a deficient number, since it is larger than the sum of its proper divisors (159621184869).

331121011131 is a wasteful number, since it uses less digits than its factorization.

331121011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813755 (or 4813749 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 331121011131 its reverse (131110121133), we get a palindrome (462231132264).

The spelling of 331121011131 in words is "three hundred thirty-one billion, one hundred twenty-one million, eleven thousand, one hundred thirty-one".