121982917751 has 2 divisors, whose sum is σ = 121982917752. Its totient is φ = 121982917750.

The previous prime is 121982917739. The next prime is 121982917759. The reversal of 121982917751 is 157719289121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121982917751 - 2⁶ = 121982917687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121982917693 and 121982917702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121982917759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60991458875 + 60991458876.

It is an arithmetic number, because the mean of its divisors is an integer number (60991458876).

Almost surely, 2^121982917751 is an apocalyptic number.

121982917751 is a deficient number, since it is larger than the sum of its proper divisors (1).

121982917751 is an equidigital number, since it uses as much as digits as its factorization.

121982917751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 53.

The spelling of 121982917751 in words is "one hundred twenty-one billion, nine hundred eighty-two million, nine hundred seventeen thousand, seven hundred fifty-one".