121313221187 has 2 divisors, whose sum is σ = 121313221188. Its totient is φ = 121313221186.

The previous prime is 121313221181. The next prime is 121313221213. The reversal of 121313221187 is 781122313121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121313221187 - 2⁶ = 121313221123 is a prime.

It is not a weakly prime, because it can be changed into another prime (121313221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656610593 + 60656610594.

It is an arithmetic number, because the mean of its divisors is an integer number (60656610594).

Almost surely, 2^121313221187 is an apocalyptic number.

121313221187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121313221187 is an equidigital number, since it uses as much as digits as its factorization.

121313221187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The spelling of 121313221187 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred twenty-one thousand, one hundred eighty-seven".