121366361026513 has 2 divisors, whose sum is σ = 121366361026514. Its totient is φ = 121366361026512.

The previous prime is 121366361026501. The next prime is 121366361026517. The reversal of 121366361026513 is 315620163663121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120146765477904 + 1219595548609 = 10961148^2 + 1104353^2 .

It is an emirp because it is prime and its reverse (315620163663121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121366361026513 - 2¹³ = 121366361018321 is a prime.

It is not a weakly prime, because it can be changed into another prime (121366361026517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60683180513256 + 60683180513257.

It is an arithmetic number, because the mean of its divisors is an integer number (60683180513257).

Almost surely, 2^{121366361026513} is an apocalyptic number.

It is an amenable number.

121366361026513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121366361026513 is an equidigital number, since it uses as much as digits as its factorization.

121366361026513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 121366361026513 in words is "one hundred twenty-one trillion, three hundred sixty-six billion, three hundred sixty-one million, twenty-six thousand, five hundred thirteen".