31311111112 has 8 divisors (see below), whose sum is σ = 58708333350. Its totient is φ = 15655555552.

The previous prime is 31311111109. The next prime is 31311111121. The reversal of 31311111112 is 21111111313.

It can be written as a sum of positive squares in only one way, i.e., 27717588196 + 3593522916 = 166486^2 + 59946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956944437 + ... + 1956944452.

Almost surely, 2^31311111112 is an apocalyptic number.

It is an amenable number.

31311111112 is a deficient number, since it is larger than the sum of its proper divisors (27397222238).

31311111112 is a wasteful number, since it uses less digits than its factorization.

31311111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913888895 (or 3913888891 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

Adding to 31311111112 its reverse (21111111313), we get a palindrome (52422222425).

The spelling of 31311111112 in words is "thirty-one billion, three hundred eleven million, one hundred eleven thousand, one hundred twelve".