220201202002121 has 2 divisors, whose sum is σ = 220201202002122. Its totient is φ = 220201202002120.

The previous prime is 220201202002069. The next prime is 220201202002127. The reversal of 220201202002121 is 121200202102022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198079277476096 + 22121924526025 = 14074064^2 + 4703395^2 .

It is a cyclic number.

It is not a de Polignac number, because 220201202002121 - 2⁶ = 220201202002057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220201202002121.

It is not a weakly prime, because it can be changed into another prime (220201202002127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100601001060 + 110100601001061.

It is an arithmetic number, because the mean of its divisors is an integer number (110100601001061).

Almost surely, 2^{220201202002121} is an apocalyptic number.

It is an amenable number.

220201202002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220201202002121 is an equidigital number, since it uses as much as digits as its factorization.

220201202002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220201202002121 its reverse (121200202102022), we get a palindrome (341401404104143).

Subtracting from 220201202002121 its reverse (121200202102022), we obtain a palindrome (99000999900099).

The spelling of 220201202002121 in words is "two hundred twenty trillion, two hundred one billion, two hundred two million, two thousand, one hundred twenty-one".