222221011121 has 4 divisors (see below), whose sum is σ = 223636431732. Its totient is φ = 220805590512.

The previous prime is 222221011099. The next prime is 222221011127. The reversal of 222221011121 is 121110122222.

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 37273708096 + 184947303025 = 193064^2 + 430055^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221011121 - 2¹⁰ = 222221010097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222221011121.

It is not an unprimeable number, because it can be changed into a prime (222221011127) 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, 707710070 + ... + 707710383.

It is an arithmetic number, because the mean of its divisors is an integer number (55909107933).

Almost surely, 2^222221011121 is an apocalyptic number.

It is an amenable number.

222221011121 is a deficient number, since it is larger than the sum of its proper divisors (1415420611).

222221011121 is a wasteful number, since it uses less digits than its factorization.

222221011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415420610.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222221011121 its reverse (121110122222), we get a palindrome (343331133343).

The spelling of 222221011121 in words is "two hundred twenty-two billion, two hundred twenty-one million, eleven thousand, one hundred twenty-one".