31121479112 has 8 divisors (see below), whose sum is σ = 58352773350. Its totient is φ = 15560739552.

The previous prime is 31121479099. The next prime is 31121479117. The reversal of 31121479112 is 21197412113.

It can be written as a sum of positive squares in only one way, i.e., 19084317316 + 12037161796 = 138146^2 + 109714^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31121479117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945092437 + ... + 1945092452.

Almost surely, 2^31121479112 is an apocalyptic number.

It is an amenable number.

31121479112 is a deficient number, since it is larger than the sum of its proper divisors (27231294238).

31121479112 is a wasteful number, since it uses less digits than its factorization.

31121479112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890184895 (or 3890184891 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

The spelling of 31121479112 in words is "thirty-one billion, one hundred twenty-one million, four hundred seventy-nine thousand, one hundred twelve".