222222101010121 has 16 divisors (see below), whose sum is σ = 240143597000208. Its totient is φ = 204867904204800.

The previous prime is 222222101010103. The next prime is 222222101010127. The reversal of 222222101010121 is 121010101222222.

It can be written as a sum of positive squares in 8 ways, for example, as 24652764174025 + 197569336836096 = 4965155^2 + 14055936^2 .

It is a cyclic number.

It is not a de Polignac number, because 222222101010121 - 2⁵ = 222222101010089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222222101010127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444341890 + ... + 444841723.

It is an arithmetic number, because the mean of its divisors is an integer number (15008974812513).

Almost surely, 2^{222222101010121} is an apocalyptic number.

It is an amenable number.

222222101010121 is a deficient number, since it is larger than the sum of its proper divisors (17921495990087).

222222101010121 is a wasteful number, since it uses less digits than its factorization.

222222101010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889183932.

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

Adding to 222222101010121 its reverse (121010101222222), we get a palindrome (343232202232343).

The spelling of 222222101010121 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred one million, ten thousand, one hundred twenty-one".