31321130331212 has 24 divisors (see below), whose sum is σ = 58207410366000. Its totient is φ = 14705029979136.

The previous prime is 31321130331203. The next prime is 31321130331221. The reversal of 31321130331212 is 21213303112313.

It is an interprime number because it is at equal distance from previous prime (31321130331203) and next prime (31321130331221).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823531837 + ... + 1823549012.

It is an arithmetic number, because the mean of its divisors is an integer number (2425308765250).

Almost surely, 2^{31321130331212} is an apocalyptic number.

It is an amenable number.

31321130331212 is a deficient number, since it is larger than the sum of its proper divisors (26886280034788).

31321130331212 is a wasteful number, since it uses less digits than its factorization.

31321130331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647080985 (or 3647080983 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31321130331212 its reverse (21213303112313), we get a palindrome (52534433443525).

The spelling of 31321130331212 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred thirty million, three hundred thirty-one thousand, two hundred twelve".