121202221213 has 2 divisors, whose sum is σ = 121202221214. Its totient is φ = 121202221212.

The previous prime is 121202221181. The next prime is 121202221229. The reversal of 121202221213 is 312122202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119365413049 + 1836808164 = 345493^2 + 42858^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202221213 - 2⁵ = 121202221181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121202221243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601110606 + 60601110607.

It is an arithmetic number, because the mean of its divisors is an integer number (60601110607).

Almost surely, 2^121202221213 is an apocalyptic number.

It is an amenable number.

121202221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202221213 is an equidigital number, since it uses as much as digits as its factorization.

121202221213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121202221213 its reverse (312122202121), we get a palindrome (433324423334).

It can be divided in two parts, 1212022 and 21213, that added together give a triangular number (1233235 = T₁₅₇₀).

The spelling of 121202221213 in words is "one hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, two hundred thirteen".