21102012300 has 36 divisors (see below), whose sum is σ = 61055156456. Its totient is φ = 5627203200.

The previous prime is 21102012299. The next prime is 21102012301. The reversal of 21102012300 is 321020112.

It is an interprime number because it is at equal distance from previous prime (21102012299) and next prime (21102012301).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21102012301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35169721 + ... + 35170320.

Almost surely, 2^21102012300 is an apocalyptic number.

21102012300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102012300 is an abundant number, since it is smaller than the sum of its proper divisors (39953144156).

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

21102012300 is a wasteful number, since it uses less digits than its factorization.

21102012300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70340058 (or 70340051 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21102012300 its reverse (321020112), we get a palindrome (21423032412).

The spelling of 21102012300 in words is "twenty-one billion, one hundred two million, twelve thousand, three hundred".