21222022111100 has 72 divisors (see below), whose sum is σ = 47644996098000. Its totient is φ = 8195194022400.

The previous prime is 21222022111079. The next prime is 21222022111111. The reversal of 21222022111100 is 111122022212.

It is a super-4 number, since 4×21222022111100⁴ (a number of 54 digits) contains 4444 as substring.

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, 26402951 + ... + 27194849.

Almost surely, 2^{21222022111100} is an apocalyptic number.

21222022111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222022111100 is an abundant number, since it is smaller than the sum of its proper divisors (26422973986900).

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

21222022111100 is a wasteful number, since it uses less digits than its factorization.

21222022111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801183 (or 801176 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222022111100 its reverse (111122022212), we get a palindrome (21333144133312).

The spelling of 21222022111100 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred eleven thousand, one hundred".