121958718331 has 2 divisors, whose sum is σ = 121958718332. Its totient is φ = 121958718330.

The previous prime is 121958718283. The next prime is 121958718359. The reversal of 121958718331 is 133817859121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121958718331 - 2¹¹ = 121958716283 is a prime.

It is a super-2 number, since 2×121958718331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121958718361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60979359165 + 60979359166.

It is an arithmetic number, because the mean of its divisors is an integer number (60979359166).

Almost surely, 2^121958718331 is an apocalyptic number.

121958718331 is a deficient number, since it is larger than the sum of its proper divisors (1).

121958718331 is an equidigital number, since it uses as much as digits as its factorization.

121958718331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 49.

The spelling of 121958718331 in words is "one hundred twenty-one billion, nine hundred fifty-eight million, seven hundred eighteen thousand, three hundred thirty-one".