20013331121220 has 96 divisors (see below), whose sum is σ = 56891383855488. Its totient is φ = 5255955254272.

The previous prime is 20013331121209. The next prime is 20013331121269. The reversal of 20013331121220 is 2212113331002.

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, 4760049 + ... + 7917368.

It is an arithmetic number, because the mean of its divisors is an integer number (592618581828).

Almost surely, 2^{20013331121220} is an apocalyptic number.

20013331121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013331121220 is an abundant number, since it is smaller than the sum of its proper divisors (36878052734268).

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

20013331121220 is a wasteful number, since it uses less digits than its factorization.

20013331121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12677829 (or 12677827 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20013331121220 its reverse (2212113331002), we get a palindrome (22225444452222).

The spelling of 20013331121220 in words is "twenty trillion, thirteen billion, three hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty".