21202122200980 has 24 divisors (see below), whose sum is σ = 50885093282688. Its totient is φ = 7269299040288.

The previous prime is 21202122200969. The next prime is 21202122200981. The reversal of 21202122200980 is 8900222120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202122200981) 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, 75721864864 + ... + 75721865143.

It is an arithmetic number, because the mean of its divisors is an integer number (2120212220112).

Almost surely, 2^{21202122200980} is an apocalyptic number.

21202122200980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202122200980 is an abundant number, since it is smaller than the sum of its proper divisors (29682971081708).

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

21202122200980 is a wasteful number, since it uses less digits than its factorization.

21202122200980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151443730023 (or 151443730021 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 21202122200980 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, two hundred thousand, nine hundred eighty".