21221827090224 has 40 divisors (see below), whose sum is σ = 54823734419520. Its totient is φ = 7073854479168.

The previous prime is 21221827090207. The next prime is 21221827090241. The reversal of 21221827090224 is 42209072812212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21221827090207) and next prime (21221827090241).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216407 + ... + 6627465.

It is an arithmetic number, because the mean of its divisors is an integer number (1370593360488).

Almost surely, 2^{21221827090224} is an apocalyptic number.

21221827090224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21221827090224 is an abundant number, since it is smaller than the sum of its proper divisors (33601907329296).

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

21221827090224 is a wasteful number, since it uses less digits than its factorization.

21221827090224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492777 (or 5492771 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 21221827090224 in words is "twenty-one trillion, two hundred twenty-one billion, eight hundred twenty-seven million, ninety thousand, two hundred twenty-four".