121373564346121 has 2 divisors, whose sum is σ = 121373564346122. Its totient is φ = 121373564346120.

The previous prime is 121373564346071. The next prime is 121373564346127. The reversal of 121373564346121 is 121643465373121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113047823436025 + 8325740910096 = 10632395^2 + 2885436^2 .

It is an emirp because it is prime and its reverse (121643465373121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121373564346121 - 2⁷ = 121373564345993 is a prime.

It is not a weakly prime, because it can be changed into another prime (121373564346127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60686782173060 + 60686782173061.

It is an arithmetic number, because the mean of its divisors is an integer number (60686782173061).

Almost surely, 2^{121373564346121} is an apocalyptic number.

It is an amenable number.

121373564346121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121373564346121 is an equidigital number, since it uses as much as digits as its factorization.

121373564346121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The spelling of 121373564346121 in words is "one hundred twenty-one trillion, three hundred seventy-three billion, five hundred sixty-four million, three hundred forty-six thousand, one hundred twenty-one".