22121311020 has 24 divisors (see below), whose sum is σ = 61939671024. Its totient is φ = 5899016256.

The previous prime is 22121311019. The next prime is 22121311021. The reversal of 22121311020 is 2011312122.

It is an interprime number because it is at equal distance from previous prime (22121311019) and next prime (22121311021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (22121311021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184344199 + ... + 184344318.

It is an arithmetic number, because the mean of its divisors is an integer number (2580819626).

Almost surely, 2^22121311020 is an apocalyptic number.

22121311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121311020 is an abundant number, since it is smaller than the sum of its proper divisors (39818360004).

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

22121311020 is a wasteful number, since it uses less digits than its factorization.

22121311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368688529 (or 368688527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22121311020 its reverse (2011312122), we get a palindrome (24132623142).

The spelling of 22121311020 in words is "twenty-two billion, one hundred twenty-one million, three hundred eleven thousand, twenty".