121858316969 has 2 divisors, whose sum is σ = 121858316970. Its totient is φ = 121858316968.

The previous prime is 121858316953. The next prime is 121858317011. The reversal of 121858316969 is 969613858121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113080875625 + 8777441344 = 336275^2 + 93688^2 .

It is a cyclic number.

It is not a de Polignac number, because 121858316969 - 2⁴ = 121858316953 is a prime.

It is a super-2 number, since 2×121858316969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121858316669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60929158484 + 60929158485.

It is an arithmetic number, because the mean of its divisors is an integer number (60929158485).

Almost surely, 2^121858316969 is an apocalyptic number.

It is an amenable number.

121858316969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121858316969 is an equidigital number, since it uses as much as digits as its factorization.

121858316969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 59.

The spelling of 121858316969 in words is "one hundred twenty-one billion, eight hundred fifty-eight million, three hundred sixteen thousand, nine hundred sixty-nine".