31111321012 has 12 divisors (see below), whose sum is σ = 57310328320. Its totient is φ = 14736941496.

The previous prime is 31111321001. The next prime is 31111321027. The reversal of 31111321012 is 21012311113.

It is a happy number.

It is a super-2 number, since 2×31111321012² (a number of 22 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, 204679668 + ... + 204679819.

Almost surely, 2^31111321012 is an apocalyptic number.

It is an amenable number.

31111321012 is a deficient number, since it is larger than the sum of its proper divisors (26199007308).

31111321012 is a wasteful number, since it uses less digits than its factorization.

31111321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409359510 (or 409359508 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31111321012 its reverse (21012311113), we get a palindrome (52123632125).

The spelling of 31111321012 in words is "thirty-one billion, one hundred eleven million, three hundred twenty-one thousand, twelve".