21121883104 has 48 divisors (see below), whose sum is σ = 50319789408. Its totient is φ = 8519749632.

The previous prime is 21121883099. The next prime is 21121883117. The reversal of 21121883104 is 40138812112.

It is a super-2 number, since 2×21121883104² (a number of 21 digits) contains 22 as substring.

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, 2769549 + ... + 2777164.

It is an arithmetic number, because the mean of its divisors is an integer number (1048328946).

Almost surely, 2^21121883104 is an apocalyptic number.

It is an amenable number.

21121883104 is an abundant number, since it is smaller than the sum of its proper divisors (29197906304).

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

21121883104 is a wasteful number, since it uses less digits than its factorization.

21121883104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546747 (or 5546739 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 21121883104 in words is "twenty-one billion, one hundred twenty-one million, eight hundred eighty-three thousand, one hundred four".