20001122120 has 32 divisors (see below), whose sum is σ = 51431457600. Its totient is φ = 6857527488.

The previous prime is 20001122093. The next prime is 20001122171. The reversal of 20001122120 is 2122110002.

It is a happy 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, 35716010 + ... + 35716569.

It is an arithmetic number, because the mean of its divisors is an integer number (1607233050).

Almost surely, 2^20001122120 is an apocalyptic number.

20001122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001122120 is an abundant number, since it is smaller than the sum of its proper divisors (31430335480).

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

20001122120 is a wasteful number, since it uses less digits than its factorization.

20001122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71432597 (or 71432593 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001122120 its reverse (2122110002), we get a palindrome (22123232122).

The spelling of 20001122120 in words is "twenty billion, one million, one hundred twenty-two thousand, one hundred twenty".