121113439 has 2 divisors, whose sum is σ = 121113440. Its totient is φ = 121113438.

The previous prime is 121113437. The next prime is 121113449. The reversal of 121113439 is 934311121.

It is a weak prime.

It is an emirp because it is prime and its reverse (934311121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121113439 - 2¹ = 121113437 is a prime.

Together with 121113437, 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 (121113431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556719 + 60556720.

It is an arithmetic number, because the mean of its divisors is an integer number (60556720).

Almost surely, 2^121113439 is an apocalyptic number.

121113439 is a deficient number, since it is larger than the sum of its proper divisors (1).

121113439 is an equidigital number, since it uses as much as digits as its factorization.

121113439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 121113439 is about 11005.1551102199. The cubic root of 121113439 is about 494.7632633235.

The spelling of 121113439 in words is "one hundred twenty-one million, one hundred thirteen thousand, four hundred thirty-nine".