120121021320 has 64 divisors (see below), whose sum is σ = 360746360640. Its totient is φ = 31998201600.

The previous prime is 120121021309. The next prime is 120121021357. The reversal of 120121021320 is 23120121021.

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 120121021320.

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, 418966 + ... + 644805.

It is an arithmetic number, because the mean of its divisors is an integer number (5636661885).

Almost surely, 2^120121021320 is an apocalyptic number.

120121021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120121021320 is an abundant number, since it is smaller than the sum of its proper divisors (240625339320).

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

120121021320 is a wasteful number, since it uses less digits than its factorization.

120121021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064726 (or 1064722 counting only the distinct ones).

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

Adding to 120121021320 its reverse (23120121021), we get a palindrome (143241142341).

The spelling of 120121021320 in words is "one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, three hundred twenty".