121117514989 has 2 divisors, whose sum is σ = 121117514990. Its totient is φ = 121117514988.

The previous prime is 121117514939. The next prime is 121117515011. The reversal of 121117514989 is 989415711121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67262422500 + 53855092489 = 259350^2 + 232067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121117514989 is a prime.

It is a super-2 number, since 2×121117514989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121117514939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60558757494 + 60558757495.

It is an arithmetic number, because the mean of its divisors is an integer number (60558757495).

Almost surely, 2^121117514989 is an apocalyptic number.

It is an amenable number.

121117514989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121117514989 is an equidigital number, since it uses as much as digits as its factorization.

121117514989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 49.

The spelling of 121117514989 in words is "one hundred twenty-one billion, one hundred seventeen million, five hundred fourteen thousand, nine hundred eighty-nine".