22121311220 has 24 divisors (see below), whose sum is σ = 48474526464. Its totient is φ = 8463805856.

The previous prime is 22121311213. The next prime is 22121311301. The reversal of 22121311220 is 2211312122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24044444 + ... + 24045363.

It is an arithmetic number, because the mean of its divisors is an integer number (2019771936).

Almost surely, 2^22121311220 is an apocalyptic number.

22121311220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121311220 is an abundant number, since it is smaller than the sum of its proper divisors (26353215244).

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

22121311220 is a wasteful number, since it uses less digits than its factorization.

22121311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48089839 (or 48089837 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22121311220 its reverse (2211312122), we get a palindrome (24332623342).

The spelling of 22121311220 in words is "twenty-two billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty".