21100525224 has 64 divisors (see below), whose sum is σ = 55142400000. Its totient is φ = 6720442560.

The previous prime is 21100525181. The next prime is 21100525241. The reversal of 21100525224 is 42252500112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21100525194 and 21100525203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120724 + ... + 238275.

It is an arithmetic number, because the mean of its divisors is an integer number (861600000).

Almost surely, 2^21100525224 is an apocalyptic number.

21100525224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21100525224 is an abundant number, since it is smaller than the sum of its proper divisors (34041874776).

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

21100525224 is a wasteful number, since it uses less digits than its factorization.

21100525224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359118 (or 359114 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 21100525224 in words is "twenty-one billion, one hundred million, five hundred twenty-five thousand, two hundred twenty-four".