121600756309 has 2 divisors, whose sum is σ = 121600756310. Its totient is φ = 121600756308.

The previous prime is 121600756273. The next prime is 121600756327. The reversal of 121600756309 is 903657006121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116568982084 + 5031774225 = 341422^2 + 70935^2 .

It is a cyclic number.

It is not a de Polignac number, because 121600756309 - 2⁹ = 121600755797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121600756009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60800378154 + 60800378155.

It is an arithmetic number, because the mean of its divisors is an integer number (60800378155).

Almost surely, 2^121600756309 is an apocalyptic number.

It is an amenable number.

121600756309 is a deficient number, since it is larger than the sum of its proper divisors (1).

121600756309 is an equidigital number, since it uses as much as digits as its factorization.

121600756309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 121600756309 in words is "one hundred twenty-one billion, six hundred million, seven hundred fifty-six thousand, three hundred nine".