121215974 has 16 divisors (see below), whose sum is σ = 198581760. Its totient is φ = 55034760.

The previous prime is 121215947. The next prime is 121215977. The reversal of 121215974 is 479512121.

It is a self number, because there is not a number n which added to its sum of digits gives 121215974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121215977) by changing a digit.

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, 20207 + ... + 25509.

It is an arithmetic number, because the mean of its divisors is an integer number (12411360).

Almost surely, 2^121215974 is an apocalyptic number.

121215974 is a deficient number, since it is larger than the sum of its proper divisors (77365786).

121215974 is a wasteful number, since it uses less digits than its factorization.

121215974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355.

The product of its digits is 5040, while the sum is 32.

The square root of 121215974 is about 11009.8126232920. The cubic root of 121215974 is about 494.9028466270.

The spelling of 121215974 in words is "one hundred twenty-one million, two hundred fifteen thousand, nine hundred seventy-four".