121311742 has 16 divisors (see below), whose sum is σ = 188111232. Its totient is φ = 58613760.

The previous prime is 121311731. The next prime is 121311761. The reversal of 121311742 is 247113121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70638 + ... + 72334.

It is an arithmetic number, because the mean of its divisors is an integer number (11756952).

Almost surely, 2^121311742 is an apocalyptic number.

121311742 is a deficient number, since it is larger than the sum of its proper divisors (66799490).

121311742 is a wasteful number, since it uses less digits than its factorization.

121311742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883.

The product of its digits is 336, while the sum is 22.

The square root of 121311742 is about 11014.1609757621. The cubic root of 121311742 is about 495.0331467787.

Adding to 121311742 its reverse (247113121), we get a palindrome (368424863).

The spelling of 121311742 in words is "one hundred twenty-one million, three hundred eleven thousand, seven hundred forty-two".