215120132120 has 64 divisors (see below), whose sum is σ = 485471448000. Its totient is φ = 85790366208.

The previous prime is 215120132119. The next prime is 215120132159. The reversal of 215120132120 is 21231021512.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 215120132092 and 215120132101.

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, 30427946 + ... + 30435014.

It is an arithmetic number, because the mean of its divisors is an integer number (7585491375).

Almost surely, 2^215120132120 is an apocalyptic number.

215120132120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215120132120 is an abundant number, since it is smaller than the sum of its proper divisors (270351315880).

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

215120132120 is a wasteful number, since it uses less digits than its factorization.

215120132120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9252 (or 9248 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 215120132120 its reverse (21231021512), we get a palindrome (236351153632).

The spelling of 215120132120 in words is "two hundred fifteen billion, one hundred twenty million, one hundred thirty-two thousand, one hundred twenty".