200220002121221 has 2 divisors, whose sum is σ = 200220002121222. Its totient is φ = 200220002121220.

The previous prime is 200220002121211. The next prime is 200220002121263. The reversal of 200220002121221 is 122121200022002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188561260161121 + 11658741960100 = 13731761^2 + 3414490^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220002121221 - 2³⁰ = 200218928379397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200220002121221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200220002121211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110001060610 + 100110001060611.

It is an arithmetic number, because the mean of its divisors is an integer number (100110001060611).

Almost surely, 2^{200220002121221} is an apocalyptic number.

It is an amenable number.

200220002121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200220002121221 is an equidigital number, since it uses as much as digits as its factorization.

200220002121221 is an evil number, because the sum of its binary digits is even.

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

Adding to 200220002121221 its reverse (122121200022002), we get a palindrome (322341202143223).

The spelling of 200220002121221 in words is "two hundred trillion, two hundred twenty billion, two million, one hundred twenty-one thousand, two hundred twenty-one".