21222233112 has 32 divisors (see below), whose sum is σ = 53059261680. Its totient is φ = 7073587200.

The previous prime is 21222233003. The next prime is 21222233113. The reversal of 21222233112 is 21133222212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222233113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537768 + ... + 575880.

Almost surely, 2^21222233112 is an apocalyptic number.

It is an amenable number.

21222233112 is an abundant number, since it is smaller than the sum of its proper divisors (31837028568).

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

21222233112 is a wasteful number, since it uses less digits than its factorization.

21222233112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61323 (or 61319 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 21222233112 its reverse (21133222212), we get a palindrome (42355455324).

The spelling of 21222233112 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, one hundred twelve".