2222200121 has 2 divisors, whose sum is σ = 2222200122. Its totient is φ = 2222200120.

The previous prime is 2222200117. The next prime is 2222200133. The reversal of 2222200121 is 1210022222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517881600 + 704318521 = 38960^2 + 26539^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222200121 - 2² = 2222200117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2222200096 and 2222200105.

It is not a weakly prime, because it can be changed into another prime (2222200151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111100060 + 1111100061.

It is an arithmetic number, because the mean of its divisors is an integer number (1111100061).

Almost surely, 2^2222200121 is an apocalyptic number.

It is an amenable number.

2222200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222200121 is an equidigital number, since it uses as much as digits as its factorization.

2222200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2222200121 is about 47140.2176596587. The cubic root of 2222200121 is about 1304.9515542073.

Adding to 2222200121 its reverse (1210022222), we get a palindrome (3432222343).

The spelling of 2222200121 in words is "two billion, two hundred twenty-two million, two hundred thousand, one hundred twenty-one".