120121221200020 has 24 divisors (see below), whose sum is σ = 253236099801384. Its totient is φ = 47861529378816.

The previous prime is 120121221199951. The next prime is 120121221200051. The reversal of 120121221200020 is 20002122121021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48168957828996 + 71952263371024 = 6940386^2 + 8482468^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120121221199967 and 120121221200003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11684938557 + ... + 11684948836.

It is an arithmetic number, because the mean of its divisors is an integer number (10551504158391).

Almost surely, 2^{120121221200020} is an apocalyptic number.

120121221200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120121221200020 is an abundant number, since it is smaller than the sum of its proper divisors (133114878601364).

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

120121221200020 is a wasteful number, since it uses less digits than its factorization.

120121221200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23369887659 (or 23369887657 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 120121221200020 its reverse (20002122121021), we get a palindrome (140123343321041).

The spelling of 120121221200020 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, twenty".