222212221022021 has 4 divisors (see below), whose sum is σ = 222357362905344. Its totient is φ = 222067079138700.

The previous prime is 222212221022017. The next prime is 222212221022053. The reversal of 222212221022021 is 120220122212222.

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 222212221022021 - 2² = 222212221022017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212221022821) 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, 72570939365 + ... + 72570942426.

It is an arithmetic number, because the mean of its divisors is an integer number (55589340726336).

Almost surely, 2^{222212221022021} is an apocalyptic number.

It is an amenable number.

222212221022021 is a deficient number, since it is larger than the sum of its proper divisors (145141883323).

222212221022021 is a wasteful number, since it uses less digits than its factorization.

222212221022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145141883322.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222212221022021 its reverse (120220122212222), we get a palindrome (342432343234243).

The spelling of 222212221022021 in words is "two hundred twenty-two trillion, two hundred twelve billion, two hundred twenty-one million, twenty-two thousand, twenty-one".