121431242 has 16 divisors (see below), whose sum is σ = 192144960. Its totient is φ = 57396672.

The previous prime is 121431239. The next prime is 121431257. The reversal of 121431242 is 242134121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15938 + ... + 22290.

It is an arithmetic number, because the mean of its divisors is an integer number (12009060).

Almost surely, 2^121431242 is an apocalyptic number.

121431242 is a deficient number, since it is larger than the sum of its proper divisors (70713718).

121431242 is a wasteful number, since it uses less digits than its factorization.

121431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6877.

The product of its digits is 384, while the sum is 20.

The square root of 121431242 is about 11019.5844749246. The cubic root of 121431242 is about 495.1956401103.

Adding to 121431242 its reverse (242134121), we get a palindrome (363565363).

The spelling of 121431242 in words is "one hundred twenty-one million, four hundred thirty-one thousand, two hundred forty-two".