121383239 has 2 divisors, whose sum is σ = 121383240. Its totient is φ = 121383238.

The previous prime is 121383217. The next prime is 121383257. The reversal of 121383239 is 932383121.

It is a strong prime.

It is an emirp because it is prime and its reverse (932383121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121383239 is a prime.

It is a super-2 number, since 2×121383239² = 29467781420262242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121383209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60691619 + 60691620.

It is an arithmetic number, because the mean of its divisors is an integer number (60691620).

Almost surely, 2^121383239 is an apocalyptic number.

121383239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121383239 is an equidigital number, since it uses as much as digits as its factorization.

121383239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 121383239 is about 11017.4061829452. The cubic root of 121383239 is about 495.1303795593.

The spelling of 121383239 in words is "one hundred twenty-one million, three hundred eighty-three thousand, two hundred thirty-nine".