121959676959181 has 2 divisors, whose sum is σ = 121959676959182. Its totient is φ = 121959676959180.

The previous prime is 121959676959139. The next prime is 121959676959193. The reversal of 121959676959181 is 181959676959121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82873548387081 + 39086128572100 = 9103491^2 + 6251890^2 .

It is a cyclic number.

It is not a de Polignac number, because 121959676959181 - 2³¹ = 121957529475533 is a prime.

It is a super-2 number, since 2×121959676959181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121959676959121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60979838479590 + 60979838479591.

It is an arithmetic number, because the mean of its divisors is an integer number (60979838479591).

Almost surely, 2^{121959676959181} is an apocalyptic number.

It is an amenable number.

121959676959181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121959676959181 is an equidigital number, since it uses as much as digits as its factorization.

121959676959181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 661348800, while the sum is 79.

The spelling of 121959676959181 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 eighty-one".