21121001100992 has 28 divisors (see below), whose sum is σ = 45135985527696. Its totient is φ = 9748154353920.

The previous prime is 21121001100919. The next prime is 21121001101021. The reversal of 21121001100992 is 29900110012112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12692908484 + ... + 12692910147.

It is an arithmetic number, because the mean of its divisors is an integer number (1611999483132).

Almost surely, 2^{21121001100992} is an apocalyptic number.

It is an amenable number.

21121001100992 is an abundant number, since it is smaller than the sum of its proper divisors (24014984426704).

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

21121001100992 is a wasteful number, since it uses less digits than its factorization.

21121001100992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25385818656 (or 25385818646 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 21121001100992 in words is "twenty-one trillion, one hundred twenty-one billion, one million, one hundred thousand, nine hundred ninety-two".