222102111211221 has 4 divisors (see below), whose sum is σ = 296136148281632. Its totient is φ = 148068074140812.

The previous prime is 222102111211217. The next prime is 222102111211231. The reversal of 222102111211221 is 122112111201222.

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 not a de Polignac number, because 222102111211221 - 2² = 222102111211217 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 (222102111211231) 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, 37017018535201 + ... + 37017018535206.

It is an arithmetic number, because the mean of its divisors is an integer number (74034037070408).

Almost surely, 2^{222102111211221} is an apocalyptic number.

It is an amenable number.

222102111211221 is a deficient number, since it is larger than the sum of its proper divisors (74034037070411).

222102111211221 is an equidigital number, since it uses as much as digits as its factorization.

222102111211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74034037070410.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 222102111211221 its reverse (122112111201222), we get a palindrome (344214222412443).

Subtracting from 222102111211221 its reverse (122112111201222), we obtain a palindrome (99990000009999).

The spelling of 222102111211221 in words is "two hundred twenty-two trillion, one hundred two billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".