121959676959137 has 2 divisors, whose sum is σ = 121959676959138. Its totient is φ = 121959676959136.

The previous prime is 121959676959121. The next prime is 121959676959139. The reversal of 121959676959137 is 731959676959121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79837513113856 + 42122163845281 = 8935184^2 + 6490159^2 .

It is a cyclic number.

It is not a de Polignac number, because 121959676959137 - 2⁴ = 121959676959121 is a prime.

Together with 121959676959139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121959676959139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60979838479568 + 60979838479569.

It is an arithmetic number, because the mean of its divisors is an integer number (60979838479569).

Almost surely, 2^{121959676959137} is an apocalyptic number.

It is an amenable number.

121959676959137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121959676959137 is an equidigital number, since it uses as much as digits as its factorization.

121959676959137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1736040600, while the sum is 80.

The spelling of 121959676959137 in words is "one hundred twenty-one trillion, nine hundred fifty-nine billion, six hundred seventy-six million, nine hundred fifty-nine thousand, one hundred thirty-seven".