21301310100 has 72 divisors (see below), whose sum is σ = 70436339008. Its totient is φ = 4868870400.

The previous prime is 21301310099. The next prime is 21301310111. The reversal of 21301310100 is 101310312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5069641 + ... + 5073840.

Almost surely, 2^21301310100 is an apocalyptic number.

21301310100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301310100 is an abundant number, since it is smaller than the sum of its proper divisors (49135028908).

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

21301310100 is a wasteful number, since it uses less digits than its factorization.

21301310100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143505 (or 10143498 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21301310100 its reverse (101310312), we get a palindrome (21402620412).

The spelling of 21301310100 in words is "twenty-one billion, three hundred one million, three hundred ten thousand, one hundred".