31133113012 has 24 divisors (see below), whose sum is σ = 55758348800. Its totient is φ = 15202264896.

The previous prime is 31133113003. The next prime is 31133113117. The reversal of 31133113012 is 21031133113.

It is a congruent number.

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, 2028664 + ... + 2043952.

Almost surely, 2^31133113012 is an apocalyptic number.

It is an amenable number.

31133113012 is a deficient number, since it is larger than the sum of its proper divisors (24625235788).

31133113012 is a wasteful number, since it uses less digits than its factorization.

31133113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27175 (or 27173 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31133113012 its reverse (21031133113), we get a palindrome (52164246125).

The spelling of 31133113012 in words is "thirty-one billion, one hundred thirty-three million, one hundred thirteen thousand, twelve".