222112303211221 has 4 divisors (see below), whose sum is σ = 222429153858444. Its totient is φ = 221795452564000.

The previous prime is 222112303211209. The next prime is 222112303211261. The reversal of 222112303211221 is 122112303211222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167927776103025 + 54184527108196 = 12958695^2 + 7361014^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112303211221 - 2⁵ = 222112303211189 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 (222112303211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158425322560 + ... + 158425323961.

It is an arithmetic number, because the mean of its divisors is an integer number (55607288464611).

Almost surely, 2^{222112303211221} is an apocalyptic number.

It is an amenable number.

222112303211221 is a deficient number, since it is larger than the sum of its proper divisors (316850647223).

222112303211221 is an equidigital number, since it uses as much as digits as its factorization.

222112303211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316850647222.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 222112303211221 its reverse (122112303211222), we get a palindrome (344224606422443).

Subtracting from 222112303211221 its reverse (122112303211222), we obtain a palindrome (99999999999999).

The spelling of 222112303211221 in words is "two hundred twenty-two trillion, one hundred twelve billion, three hundred three million, two hundred eleven thousand, two hundred twenty-one".