121761657299 has 2 divisors, whose sum is σ = 121761657300. Its totient is φ = 121761657298.

The previous prime is 121761657287. The next prime is 121761657317. The reversal of 121761657299 is 992756167121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121761657299 - 2³⁶ = 53042180563 is a prime.

It is not a weakly prime, because it can be changed into another prime (121761657209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60880828649 + 60880828650.

It is an arithmetic number, because the mean of its divisors is an integer number (60880828650).

Almost surely, 2^121761657299 is an apocalyptic number.

121761657299 is a deficient number, since it is larger than the sum of its proper divisors (1).

121761657299 is an equidigital number, since it uses as much as digits as its factorization.

121761657299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 56.

The spelling of 121761657299 in words is "one hundred twenty-one billion, seven hundred sixty-one million, six hundred fifty-seven thousand, two hundred ninety-nine".