21311022300 has 72 divisors (see below), whose sum is σ = 62016457776. Its totient is φ = 5650076160.

The previous prime is 21311022277. The next prime is 21311022319. The reversal of 21311022300 is 322011312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21311022300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153409 + ... + 257208.

Almost surely, 2^21311022300 is an apocalyptic number.

21311022300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311022300 is an abundant number, since it is smaller than the sum of its proper divisors (40705435476).

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

21311022300 is a wasteful number, since it uses less digits than its factorization.

21311022300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410807 (or 410800 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21311022300 its reverse (322011312), we get a palindrome (21633033612).

The spelling of 21311022300 in words is "twenty-one billion, three hundred eleven million, twenty-two thousand, three hundred".