21310230122100 has 72 divisors (see below), whose sum is σ = 68508443512320. Its totient is φ = 5682728031840.

The previous prime is 21310230122039. The next prime is 21310230122141. The reversal of 21310230122100 is 122103201312.

21310230122100 is a `hidden beast` number, since 2 + 1 + 310 + 230 + 1 + 22 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 3946336212 + ... + 3946341611.

Almost surely, 2^{21310230122100} is an apocalyptic number.

21310230122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310230122100 is an abundant number, since it is smaller than the sum of its proper divisors (47198213390220).

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

21310230122100 is a wasteful number, since it uses less digits than its factorization.

21310230122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892677846 (or 7892677833 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21310230122100 its reverse (122103201312), we get a palindrome (21432333323412).

The spelling of 21310230122100 in words is "twenty-one trillion, three hundred ten billion, two hundred thirty million, one hundred twenty-two thousand, one hundred".