2121331322220 has 96 divisors (see below), whose sum is σ = 6533254457856. Its totient is φ = 514262119360.

The previous prime is 2121331322203. The next prime is 2121331322233. The reversal of 2121331322220 is 222231331212.

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, 13201704 + ... + 13361423.

It is an arithmetic number, because the mean of its divisors is an integer number (68054733936).

Almost surely, 2^{2121331322220} is an apocalyptic number.

2121331322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121331322220 is an abundant number, since it is smaller than the sum of its proper divisors (4411923135636).

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

2121331322220 is a wasteful number, since it uses less digits than its factorization.

2121331322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26563172 (or 26563148 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2121331322220 its reverse (222231331212), we get a palindrome (2343562653432).

The spelling of 2121331322220 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, two hundred twenty".