30131113012 has 96 divisors (see below), whose sum is σ = 71050420224. Its totient is φ = 10797667200.

The previous prime is 30131112989. The next prime is 30131113057. The reversal of 30131113012 is 21031113103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1119837 + ... + 1146427.

It is an arithmetic number, because the mean of its divisors is an integer number (740108544).

Almost surely, 2^30131113012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30131113012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35525210112).

30131113012 is an abundant number, since it is smaller than the sum of its proper divisors (40919307212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30131113012 is a wasteful number, since it uses less digits than its factorization.

30131113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26909 (or 26907 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 30131113012 its reverse (21031113103), we get a palindrome (51162226115).

Subtracting from 30131113012 its reverse (21031113103), we obtain a palindrome (9099999909).

The spelling of 30131113012 in words is "thirty billion, one hundred thirty-one million, one hundred thirteen thousand, twelve".