2110202121221 has 2 divisors, whose sum is σ = 2110202121222. Its totient is φ = 2110202121220.

The previous prime is 2110202121187. The next prime is 2110202121233. The reversal of 2110202121221 is 1221212020112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1684427601025 + 425774520196 = 1297855^2 + 652514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110202121221 - 2²⁶ = 2110135012357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2110202121221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110202141221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055101060610 + 1055101060611.

It is an arithmetic number, because the mean of its divisors is an integer number (1055101060611).

Almost surely, 2^{2110202121221} is an apocalyptic number.

It is an amenable number.

2110202121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110202121221 is an equidigital number, since it uses as much as digits as its factorization.

2110202121221 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 17.

Adding to 2110202121221 its reverse (1221212020112), we get a palindrome (3331414141333).

The spelling of 2110202121221 in words is "two trillion, one hundred ten billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".