121982376137 has 2 divisors, whose sum is σ = 121982376138. Its totient is φ = 121982376136.

The previous prime is 121982376107. The next prime is 121982376203. The reversal of 121982376137 is 731673289121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83300927161 + 38681448976 = 288619^2 + 196676^2 .

It is a cyclic number.

It is not a de Polignac number, because 121982376137 - 2¹⁶ = 121982310601 is a prime.

It is not a weakly prime, because it can be changed into another prime (121982376107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60991188068 + 60991188069.

It is an arithmetic number, because the mean of its divisors is an integer number (60991188069).

Almost surely, 2^121982376137 is an apocalyptic number.

It is an amenable number.

121982376137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121982376137 is an equidigital number, since it uses as much as digits as its factorization.

121982376137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The spelling of 121982376137 in words is "one hundred twenty-one billion, nine hundred eighty-two million, three hundred seventy-six thousand, one hundred thirty-seven".