21322222100 has 36 divisors (see below), whose sum is σ = 47253683904. Its totient is φ = 8347421280.

The previous prime is 21322222093. The next prime is 21322222111. The reversal of 21322222100 is 122222312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2263622 + ... + 2273021.

Almost surely, 2^21322222100 is an apocalyptic number.

21322222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322222100 is an abundant number, since it is smaller than the sum of its proper divisors (25931461804).

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

21322222100 is a wasteful number, since it uses less digits than its factorization.

21322222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536704 (or 4536697 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21322222100 its reverse (122222312), we get a palindrome (21444444412).

The spelling of 21322222100 in words is "twenty-one billion, three hundred twenty-two million, two hundred twenty-two thousand, one hundred".