121326391 has 2 divisors, whose sum is σ = 121326392. Its totient is φ = 121326390.

The previous prime is 121326341. The next prime is 121326397. The reversal of 121326391 is 193623121.

121326391 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121326391 is a 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 (121326397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60663195 + 60663196.

It is an arithmetic number, because the mean of its divisors is an integer number (60663196).

Almost surely, 2^121326391 is an apocalyptic number.

121326391 is a deficient number, since it is larger than the sum of its proper divisors (1).

121326391 is an equidigital number, since it uses as much as digits as its factorization.

121326391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 121326391 is about 11014.8259632188. The cubic root of 121326391 is about 495.0530718868.

The spelling of 121326391 in words is "one hundred twenty-one million, three hundred twenty-six thousand, three hundred ninety-one".