120121120020 has 96 divisors (see below), whose sum is σ = 370548452736. Its totient is φ = 28831936000.

The previous prime is 120121120019. The next prime is 120121120051. The reversal of 120121120020 is 20021121021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 120121119978 and 120121120005.

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, 834339 + ... + 967658.

It is an arithmetic number, because the mean of its divisors is an integer number (3859879716).

Almost surely, 2^120121120020 is an apocalyptic number.

120121120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120121120020 is an abundant number, since it is smaller than the sum of its proper divisors (250427332716).

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

120121120020 is a wasteful number, since it uses less digits than its factorization.

120121120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802121 (or 1802119 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120121120020 its reverse (20021121021), we get a palindrome (140142241041).

The spelling of 120121120020 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, twenty".