21201120220984 has 32 divisors (see below), whose sum is σ = 43372579094640. Its totient is φ = 9635394745600.

The previous prime is 21201120220979. The next prime is 21201120221023. The reversal of 21201120220984 is 48902202110212.

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, 17898919 + ... + 19046614.

Almost surely, 2^{21201120220984} is an apocalyptic number.

It is an amenable number.

21201120220984 is an abundant number, since it is smaller than the sum of its proper divisors (22171458873656).

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

21201120220984 is a wasteful number, since it uses less digits than its factorization.

21201120220984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36952071 (or 36952067 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 21201120220984 in words is "twenty-one trillion, two hundred one billion, one hundred twenty million, two hundred twenty thousand, nine hundred eighty-four".