121329191 has 2 divisors, whose sum is σ = 121329192. Its totient is φ = 121329190.

The previous prime is 121329181. The next prime is 121329203. The reversal of 121329191 is 191923121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121329191 - 2²² = 117134887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121329181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60664595 + 60664596.

It is an arithmetic number, because the mean of its divisors is an integer number (60664596).

Almost surely, 2^121329191 is an apocalyptic number.

121329191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121329191 is an equidigital number, since it uses as much as digits as its factorization.

121329191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 121329191 is about 11014.9530639036. The cubic root of 121329191 is about 495.0568801759.

The spelling of 121329191 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, one hundred ninety-one".