222212122021 has 4 divisors (see below), whose sum is σ = 222294456000. Its totient is φ = 222129788044.

The previous prime is 222212121997. The next prime is 222212122061. The reversal of 222212122021 is 120221212222.

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 a cyclic number.

It is not a de Polignac number, because 222212122021 - 2¹¹ = 222212119973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222212122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212122061) 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, 41162941 + ... + 41168338.

It is an arithmetic number, because the mean of its divisors is an integer number (55573614000).

Almost surely, 2^222212122021 is an apocalyptic number.

It is an amenable number.

222212122021 is a deficient number, since it is larger than the sum of its proper divisors (82333979).

222212122021 is an equidigital number, since it uses as much as digits as its factorization.

222212122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82333978.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222212122021 its reverse (120221212222), we get a palindrome (342433334243).

The spelling of 222212122021 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, twenty-one".