222110012012221 has 4 divisors (see below), whose sum is σ = 225152614916572. Its totient is φ = 219067409107872.

The previous prime is 222110012012201. The next prime is 222110012012227. The reversal of 222110012012221 is 122210210011222.

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 105164409700900 + 116945602311321 = 10254970^2 + 10814139^2 .

It is a cyclic number.

It is not a de Polignac number, because 222110012012221 - 2⁹ = 222110012011709 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 (222110012012227) 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, 1521301452066 + ... + 1521301452211.

It is an arithmetic number, because the mean of its divisors is an integer number (56288153729143).

Almost surely, 2^{222110012012221} is an apocalyptic number.

It is an amenable number.

222110012012221 is a deficient number, since it is larger than the sum of its proper divisors (3042602904351).

222110012012221 is an equidigital number, since it uses as much as digits as its factorization.

222110012012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042602904350.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222110012012221 its reverse (122210210011222), we get a palindrome (344320222023443).

The spelling of 222110012012221 in words is "two hundred twenty-two trillion, one hundred ten billion, twelve million, twelve thousand, two hundred twenty-one".