222211220221 has 4 divisors (see below), whose sum is σ = 222216120000. Its totient is φ = 222206320444.

The previous prime is 222211220213. The next prime is 222211220243. The reversal of 222211220221 is 122022112222.

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 222211220221 - 2³ = 222211220213 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 (222211220281) 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, 2381221 + ... + 2472778.

It is an arithmetic number, because the mean of its divisors is an integer number (55554030000).

Almost surely, 2^222211220221 is an apocalyptic number.

It is an amenable number.

222211220221 is a deficient number, since it is larger than the sum of its proper divisors (4899779).

222211220221 is an equidigital number, since it uses as much as digits as its factorization.

222211220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899778.

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

Adding to 222211220221 its reverse (122022112222), we get a palindrome (344233332443).

The spelling of 222211220221 in words is "two hundred twenty-two billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-one".