121243134113977 has 2 divisors, whose sum is σ = 121243134113978. Its totient is φ = 121243134113976.

The previous prime is 121243134113971. The next prime is 121243134114043. The reversal of 121243134113977 is 779311431342121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119957606730256 + 1285527383721 = 10952516^2 + 1133811^2 .

It is a cyclic number.

It is not a de Polignac number, because 121243134113977 - 2⁴³ = 112447041091769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121243134113977.

It is not a weakly prime, because it can be changed into another prime (121243134113971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621567056988 + 60621567056989.

It is an arithmetic number, because the mean of its divisors is an integer number (60621567056989).

Almost surely, 2^{121243134113977} is an apocalyptic number.

It is an amenable number.

121243134113977 is a deficient number, since it is larger than the sum of its proper divisors (1).

121243134113977 is an equidigital number, since it uses as much as digits as its factorization.

121243134113977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The spelling of 121243134113977 in words is "one hundred twenty-one trillion, two hundred forty-three billion, one hundred thirty-four million, one hundred thirteen thousand, nine hundred seventy-seven".