222002200020121 has 8 divisors (see below), whose sum is σ = 222234001003080. Its totient is φ = 221770408389888.

The previous prime is 222002200020091. The next prime is 222002200020143. The reversal of 222002200020121 is 121020002200222.

It can be written as a sum of positive squares in 4 ways, for example, as 189628432878096 + 32373767142025 = 13770564^2 + 5689795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222002200020121 - 2⁵ = 222002200020089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222002200020095 and 222002200020104.

It is not an unprimeable number, because it can be changed into a prime (222002200020191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45674175 + ... + 50300443.

It is an arithmetic number, because the mean of its divisors is an integer number (27779250125385).

Almost surely, 2^{222002200020121} is an apocalyptic number.

It is an amenable number.

222002200020121 is a deficient number, since it is larger than the sum of its proper divisors (231800982959).

222002200020121 is an equidigital number, since it uses as much as digits as its factorization.

222002200020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676363.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 222002200020121 its reverse (121020002200222), we get a palindrome (343022202220343).

The spelling of 222002200020121 in words is "two hundred twenty-two trillion, two billion, two hundred million, twenty thousand, one hundred twenty-one".