31103203112 has 8 divisors (see below), whose sum is σ = 58318505850. Its totient is φ = 15551601552.

The previous prime is 31103203067. The next prime is 31103203133. The reversal of 31103203112 is 21130230113.

It can be written as a sum of positive squares in only one way, i.e., 17335935556 + 13767267556 = 131666^2 + 117334^2 .

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, 1943950187 + ... + 1943950202.

Almost surely, 2^31103203112 is an apocalyptic number.

It is an amenable number.

31103203112 is a deficient number, since it is larger than the sum of its proper divisors (27215302738).

31103203112 is a wasteful number, since it uses less digits than its factorization.

31103203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887900395 (or 3887900391 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31103203112 its reverse (21130230113), we get a palindrome (52233433225).

The spelling of 31103203112 in words is "thirty-one billion, one hundred three million, two hundred three thousand, one hundred twelve".