121931242 has 16 divisors (see below), whose sum is σ = 194011200. Its totient is φ = 57274048.

The previous prime is 121931237. The next prime is 121931261. The reversal of 121931242 is 242139121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17373 + ... + 23359.

It is an arithmetic number, because the mean of its divisors is an integer number (12125700).

Almost surely, 2^121931242 is an apocalyptic number.

121931242 is a deficient number, since it is larger than the sum of its proper divisors (72079958).

121931242 is a wasteful number, since it uses less digits than its factorization.

121931242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6605.

The product of its digits is 864, while the sum is 25.

The square root of 121931242 is about 11042.2480501028. The cubic root of 121931242 is about 495.8743747274.

The spelling of 121931242 in words is "one hundred twenty-one million, nine hundred thirty-one thousand, two hundred forty-two".