331131321212 has 12 divisors (see below), whose sum is σ = 579573064560. Its totient is φ = 165539017056.

The previous prime is 331131321203. The next prime is 331131321239. The reversal of 331131321212 is 212123131133.

It is a super-2 number, since 2×331131321212² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632912 + ... + 6682647.

It is an arithmetic number, because the mean of its divisors is an integer number (48297755380).

Almost surely, 2^331131321212 is an apocalyptic number.

It is an amenable number.

331131321212 is a deficient number, since it is larger than the sum of its proper divisors (248441743348).

331131321212 is a wasteful number, since it uses less digits than its factorization.

331131321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13321780 (or 13321778 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 331131321212 its reverse (212123131133), we get a palindrome (543254452345).

The spelling of 331131321212 in words is "three hundred thirty-one billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred twelve".