30312012120 has 64 divisors (see below), whose sum is σ = 97931121120. Its totient is φ = 7461417984.

The previous prime is 30312012079. The next prime is 30312012161. The reversal of 30312012120 is 2121021303.

It is an interprime number because it is at equal distance from previous prime (30312012079) and next prime (30312012161).

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 30312012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9713829 + ... + 9716948.

Almost surely, 2^30312012120 is an apocalyptic number.

30312012120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30312012120 is an abundant number, since it is smaller than the sum of its proper divisors (67619109000).

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

30312012120 is a wasteful number, since it uses less digits than its factorization.

30312012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430804 (or 19430800 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30312012120 its reverse (2121021303), we get a palindrome (32433033423).

The spelling of 30312012120 in words is "thirty billion, three hundred twelve million, twelve thousand, one hundred twenty".