21022322200 has 72 divisors (see below), whose sum is σ = 53724256740. Its totient is φ = 7644472000.

The previous prime is 21022322177. The next prime is 21022322231. The reversal of 21022322200 is 222322012.

It is a super-2 number, since 2×21022322200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 410146 + ... + 458545.

Almost surely, 2^21022322200 is an apocalyptic number.

21022322200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022322200 is an abundant number, since it is smaller than the sum of its proper divisors (32701934540).

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

21022322200 is a wasteful number, since it uses less digits than its factorization.

21022322200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868729 (or 868709 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21022322200 its reverse (222322012), we get a palindrome (21244644212).

The spelling of 21022322200 in words is "twenty-one billion, twenty-two million, three hundred twenty-two thousand, two hundred".