121940680177 has 2 divisors, whose sum is σ = 121940680178. Its totient is φ = 121940680176.

The previous prime is 121940680139. The next prime is 121940680181. The reversal of 121940680177 is 771086049121.

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., 62080207281 + 59860472896 = 249159^2 + 244664^2 .

It is a cyclic number.

It is not a de Polignac number, because 121940680177 - 2⁷ = 121940680049 is a prime.

It is not a weakly prime, because it can be changed into another prime (121940680777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60970340088 + 60970340089.

It is an arithmetic number, because the mean of its divisors is an integer number (60970340089).

Almost surely, 2^121940680177 is an apocalyptic number.

It is an amenable number.

121940680177 is a deficient number, since it is larger than the sum of its proper divisors (1).

121940680177 is an equidigital number, since it uses as much as digits as its factorization.

121940680177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 121940680177 in words is "one hundred twenty-one billion, nine hundred forty million, six hundred eighty thousand, one hundred seventy-seven".