21321102023100 has 144 divisors (see below), whose sum is σ = 74774612451840. Its totient is φ = 5168751998400.

The previous prime is 21321102023063. The next prime is 21321102023141. The reversal of 21321102023100 is 132020112312.

21321102023100 is a `hidden beast` number, since 2 + 1 + 321 + 10 + 20 + 2 + 310 + 0 = 666.

It is a super-2 number, since 2×21321102023100² (a number of 27 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358911412 + ... + 358970811.

Almost surely, 2^{21321102023100} is an apocalyptic number.

21321102023100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321102023100 is an abundant number, since it is smaller than the sum of its proper divisors (53453510428740).

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

21321102023100 is a wasteful number, since it uses less digits than its factorization.

21321102023100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717882257 (or 717882244 counting only the distinct ones).

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

Adding to 21321102023100 its reverse (132020112312), we get a palindrome (21453122135412).

The spelling of 21321102023100 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred two million, twenty-three thousand, one hundred".