21222010210100 has 72 divisors (see below), whose sum is σ = 52906138457088. Its totient is φ = 7238022883200.

The previous prime is 21222010210021. The next prime is 21222010210127. The reversal of 21222010210100 is 101201022212.

It is a super-2 number, since 2×21222010210100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 79230587 + ... + 79497986.

Almost surely, 2^{21222010210100} is an apocalyptic number.

21222010210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222010210100 is an abundant number, since it is smaller than the sum of its proper divisors (31684128246988).

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

21222010210100 is a wasteful number, since it uses less digits than its factorization.

21222010210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158728785 (or 158728778 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21222010210100 its reverse (101201022212), we get a palindrome (21323211232312).

The spelling of 21222010210100 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, two hundred ten thousand, one hundred".