222212000021 has 4 divisors (see below), whose sum is σ = 242413090944. Its totient is φ = 202010909100.

The previous prime is 222211999993. The next prime is 222212000029. The reversal of 222212000021 is 120000212222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222212000021 - 2²² = 222207805717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212000029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100545445 + ... + 10100545466.

It is an arithmetic number, because the mean of its divisors is an integer number (60603272736).

Almost surely, 2^222212000021 is an apocalyptic number.

It is an amenable number.

222212000021 is a deficient number, since it is larger than the sum of its proper divisors (20201090923).

222212000021 is a wasteful number, since it uses less digits than its factorization.

222212000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201090922.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222212000021 its reverse (120000212222), we get a palindrome (342212212243).

It can be divided in two parts, 2222 and 12000021, that multiplied together give a palindrome (26664046662).

The spelling of 222212000021 in words is "two hundred twenty-two billion, two hundred twelve million, twenty-one", and thus it is an aban number.