120021312120 has 64 divisors (see below), whose sum is σ = 360094464000. Its totient is φ = 32002969728.

The previous prime is 120021312119. The next prime is 120021312143. The reversal of 120021312120 is 21213120021.

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 120021312120.

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, 1663761 + ... + 1734399.

It is an arithmetic number, because the mean of its divisors is an integer number (5626476000).

Almost surely, 2^120021312120 is an apocalyptic number.

120021312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021312120 is an abundant number, since it is smaller than the sum of its proper divisors (240073151880).

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

120021312120 is a wasteful number, since it uses less digits than its factorization.

120021312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84812 (or 84808 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 120021312120 its reverse (21213120021), we get a palindrome (141234432141).

The spelling of 120021312120 in words is "one hundred twenty billion, twenty-one million, three hundred twelve thousand, one hundred twenty".