121221021211013 has 2 divisors, whose sum is σ = 121221021211014. Its totient is φ = 121221021211012.

The previous prime is 121221021210983. The next prime is 121221021211019. The reversal of 121221021211013 is 310112120122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94931836430209 + 26289184780804 = 9743297^2 + 5127298^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221021211013 - 2³⁸ = 120946143304069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221021211019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610510605506 + 60610510605507.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510605507).

Almost surely, 2^{121221021211013} is an apocalyptic number.

It is an amenable number.

121221021211013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221021211013 is an equidigital number, since it uses as much as digits as its factorization.

121221021211013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121221021211013 its reverse (310112120122121), we get a palindrome (431333141333134).

The spelling of 121221021211013 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred eleven thousand, thirteen".