121319249 has 2 divisors, whose sum is σ = 121319250. Its totient is φ = 121319248.

The previous prime is 121319243. The next prime is 121319251. The reversal of 121319249 is 942913121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 868624 = 10975^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 121319249 - 2⁸ = 121318993 is a prime.

It is a Sophie Germain prime.

Together with 121319251, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121319243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60659624 + 60659625.

It is an arithmetic number, because the mean of its divisors is an integer number (60659625).

Almost surely, 2^121319249 is an apocalyptic number.

It is an amenable number.

121319249 is a deficient number, since it is larger than the sum of its proper divisors (1).

121319249 is an equidigital number, since it uses as much as digits as its factorization.

121319249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 121319249 is about 11014.5017590448. The cubic root of 121319249 is about 495.0433577639.

The spelling of 121319249 in words is "one hundred twenty-one million, three hundred nineteen thousand, two hundred forty-nine".