222112212021 has 16 divisors (see below), whose sum is σ = 376063004800. Its totient is φ = 126921263904.

The previous prime is 222112212013. The next prime is 222112212041. The reversal of 222112212021 is 120212211222.

It is a happy number.

It is not a de Polignac number, because 222112212021 - 2³ = 222112212013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222112211985 and 222112212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112212041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587598256 + ... + 587598633.

It is an arithmetic number, because the mean of its divisors is an integer number (23503937800).

Almost surely, 2^222112212021 is an apocalyptic number.

222112212021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222112212021 is a deficient number, since it is larger than the sum of its proper divisors (153950792779).

222112212021 is a wasteful number, since it uses less digits than its factorization.

222112212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175196905 (or 1175196899 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222112212021 its reverse (120212211222), we get a palindrome (342324423243).

The spelling of 222112212021 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twelve thousand, twenty-one".