121244239 has 2 divisors, whose sum is σ = 121244240. Its totient is φ = 121244238.

The previous prime is 121244237. The next prime is 121244261. The reversal of 121244239 is 932442121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121244239 - 2¹ = 121244237 is a prime.

Together with 121244237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121244237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60622119 + 60622120.

It is an arithmetic number, because the mean of its divisors is an integer number (60622120).

Almost surely, 2^121244239 is an apocalyptic number.

121244239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121244239 is an equidigital number, since it uses as much as digits as its factorization.

121244239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 121244239 is about 11011.0961761307. The cubic root of 121244239 is about 494.9413105944.

It can be divided in two parts, 1212 and 44239, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 121244239 in words is "one hundred twenty-one million, two hundred forty-four thousand, two hundred thirty-nine".