121188567779 has 2 divisors, whose sum is σ = 121188567780. Its totient is φ = 121188567778.

The previous prime is 121188567769. The next prime is 121188567781. The reversal of 121188567779 is 977765881121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121188567779 - 2³⁶ = 52469091043 is a prime.

Together with 121188567781, 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 (121188567769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60594283889 + 60594283890.

It is an arithmetic number, because the mean of its divisors is an integer number (60594283890).

Almost surely, 2^121188567779 is an apocalyptic number.

121188567779 is a deficient number, since it is larger than the sum of its proper divisors (1).

121188567779 is an equidigital number, since it uses as much as digits as its factorization.

121188567779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 62.

The spelling of 121188567779 in words is "one hundred twenty-one billion, one hundred eighty-eight million, five hundred sixty-seven thousand, seven hundred seventy-nine".