222202211011221 has 12 divisors (see below), whose sum is σ = 344640164017632. Its totient is φ = 126972692006328.

The previous prime is 222202211011153. The next prime is 222202211011247. The reversal of 222202211011221 is 122110112202222.

It is not a de Polignac number, because 222202211011221 - 2⁷ = 222202211011093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202211011271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 755789833225 + ... + 755789833518.

It is an arithmetic number, because the mean of its divisors is an integer number (28720013668136).

Almost surely, 2^{222202211011221} is an apocalyptic number.

222202211011221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222202211011221 is a deficient number, since it is larger than the sum of its proper divisors (122437953006411).

222202211011221 is a wasteful number, since it uses less digits than its factorization.

222202211011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511579666760 (or 1511579666753 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222202211011221 its reverse (122110112202222), we get a palindrome (344312323213443).

The spelling of 222202211011221 in words is "two hundred twenty-two trillion, two hundred two billion, two hundred eleven million, eleven thousand, two hundred twenty-one".