30031032120 has 128 divisors (see below), whose sum is σ = 92138999040. Its totient is φ = 7828254720.

The previous prime is 30031032047. The next prime is 30031032131. The reversal of 30031032120 is 2123013003.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30031032120.

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, 1038984 + ... + 1067496.

It is an arithmetic number, because the mean of its divisors is an integer number (719835930).

Almost surely, 2^30031032120 is an apocalyptic number.

30031032120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30031032120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46069499520).

30031032120 is an abundant number, since it is smaller than the sum of its proper divisors (62107966920).

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

30031032120 is a wasteful number, since it uses less digits than its factorization.

30031032120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28725 (or 28721 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 30031032120 its reverse (2123013003), we get a palindrome (32154045123).

The spelling of 30031032120 in words is "thirty billion, thirty-one million, thirty-two thousand, one hundred twenty".