222001100202221 has 4 divisors (see below), whose sum is σ = 222322375311744. Its totient is φ = 221679825092700.

The previous prime is 222001100202209. The next prime is 222001100202257. The reversal of 222001100202221 is 122202001100222.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-222001100202221 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 222001100202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001100208221) 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, 160637553725 + ... + 160637555106.

It is an arithmetic number, because the mean of its divisors is an integer number (55580593827936).

Almost surely, 2^{222001100202221} is an apocalyptic number.

It is an amenable number.

222001100202221 is a deficient number, since it is larger than the sum of its proper divisors (321275109523).

222001100202221 is an equidigital number, since it uses as much as digits as its factorization.

222001100202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321275109522.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222001100202221 its reverse (122202001100222), we get a palindrome (344203101302443).

The spelling of 222001100202221 in words is "two hundred twenty-two trillion, one billion, one hundred million, two hundred two thousand, two hundred twenty-one".