121325291 has 2 divisors, whose sum is σ = 121325292. Its totient is φ = 121325290.

The previous prime is 121325287. The next prime is 121325293. The reversal of 121325291 is 192523121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121325291 - 2² = 121325287 is a prime.

Together with 121325293, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6912800 and since 121325291 and 6912800 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121325291.

It is not a weakly prime, because it can be changed into another prime (121325293) 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, 60662645 + 60662646.

It is an arithmetic number, because the mean of its divisors is an integer number (60662646).

Almost surely, 2^121325291 is an apocalyptic number.

121325291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121325291 is an equidigital number, since it uses as much as digits as its factorization.

121325291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 121325291 is about 11014.7760304057. The cubic root of 121325291 is about 495.0515757571.

The spelling of 121325291 in words is "one hundred twenty-one million, three hundred twenty-five thousand, two hundred ninety-one".