21222022011100 has 72 divisors (see below), whose sum is σ = 48485709129200. Its totient is φ = 8040346675200.

The previous prime is 21222022011089. The next prime is 21222022011103. The reversal of 21222022011100 is 111022022212.

It is a happy number.

It is a super-2 number, since 2×21222022011100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222022011103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7932940 + ... + 10265260.

Almost surely, 2^{21222022011100} is an apocalyptic number.

21222022011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222022011100 is an abundant number, since it is smaller than the sum of its proper divisors (27263687118100).

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

21222022011100 is a wasteful number, since it uses less digits than its factorization.

21222022011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337143 (or 2337136 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222022011100 its reverse (111022022212), we get a palindrome (21333044033312).

The spelling of 21222022011100 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, eleven thousand, one hundred".