121233191 has 2 divisors, whose sum is σ = 121233192. Its totient is φ = 121233190.

The previous prime is 121233181. The next prime is 121233197. The reversal of 121233191 is 191332121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121233191 - 2¹⁸ = 120971047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121233197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60616595 + 60616596.

It is an arithmetic number, because the mean of its divisors is an integer number (60616596).

Almost surely, 2^121233191 is an apocalyptic number.

121233191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121233191 is an equidigital number, since it uses as much as digits as its factorization.

121233191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 121233191 is about 11010.5944889456. The cubic root of 121233191 is about 494.9262768143.

The spelling of 121233191 in words is "one hundred twenty-one million, two hundred thirty-three thousand, one hundred ninety-one".