21112502300 has 72 divisors (see below), whose sum is σ = 49424555376. Its totient is φ = 7798236160.

The previous prime is 21112502273. The next prime is 21112502339. The reversal of 21112502300 is 320521112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 27062 + ... + 207261.

It is an arithmetic number, because the mean of its divisors is an integer number (686452158).

Almost surely, 2^21112502300 is an apocalyptic number.

21112502300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112502300 is an abundant number, since it is smaller than the sum of its proper divisors (28312053076).

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

21112502300 is a wasteful number, since it uses less digits than its factorization.

21112502300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234407 (or 234400 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The spelling of 21112502300 in words is "twenty-one billion, one hundred twelve million, five hundred two thousand, three hundred".