210120002212121 has 2 divisors, whose sum is σ = 210120002212122. Its totient is φ = 210120002212120.

The previous prime is 210120002212069. The next prime is 210120002212129. The reversal of 210120002212121 is 121212200021012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158433450091225 + 51686552120896 = 12587035^2 + 7189336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210120002212121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210120002212121.

It is not a weakly prime, because it can be changed into another prime (210120002212129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060001106060 + 105060001106061.

It is an arithmetic number, because the mean of its divisors is an integer number (105060001106061).

Almost surely, 2^{210120002212121} is an apocalyptic number.

It is an amenable number.

210120002212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120002212121 is an equidigital number, since it uses as much as digits as its factorization.

210120002212121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210120002212121 its reverse (121212200021012), we get a palindrome (331332202233133).

The spelling of 210120002212121 in words is "two hundred ten trillion, one hundred twenty billion, two million, two hundred twelve thousand, one hundred twenty-one".