22121203220 has 24 divisors (see below), whose sum is σ = 46476294144. Its totient is φ = 8844335136.

The previous prime is 22121203211. The next prime is 22121203259. The reversal of 22121203220 is 2230212122.

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, 215204 + ... + 300923.

It is an arithmetic number, because the mean of its divisors is an integer number (1936512256).

Almost surely, 2^22121203220 is an apocalyptic number.

22121203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121203220 is an abundant number, since it is smaller than the sum of its proper divisors (24355090924).

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

22121203220 is a wasteful number, since it uses less digits than its factorization.

22121203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518279 (or 518277 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22121203220 its reverse (2230212122), we get a palindrome (24351415342).

The spelling of 22121203220 in words is "twenty-two billion, one hundred twenty-one million, two hundred three thousand, two hundred twenty".