222001002221 has 4 divisors (see below), whose sum is σ = 222605909952. Its totient is φ = 221396094492.

The previous prime is 222001002199. The next prime is 222001002229. The reversal of 222001002221 is 122200100222.

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 222001002221 - 2¹⁴ = 222000985837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222001002196 and 222001002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001002229) 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, 302453315 + ... + 302454048.

It is an arithmetic number, because the mean of its divisors is an integer number (55651477488).

Almost surely, 2^222001002221 is an apocalyptic number.

It is an amenable number.

222001002221 is a deficient number, since it is larger than the sum of its proper divisors (604907731).

222001002221 is an equidigital number, since it uses as much as digits as its factorization.

222001002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604907730.

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

Adding to 222001002221 its reverse (122200100222), we get a palindrome (344201102443).

The spelling of 222001002221 in words is "two hundred twenty-two billion, one million, two thousand, two hundred twenty-one".