121979242 has 16 divisors (see below), whose sum is σ = 228117312. Its totient is φ = 47524320.

The previous prime is 121979219. The next prime is 121979243. The reversal of 121979242 is 242979121.

It is not an unprimeable number, because it can be changed into a prime (121979243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395883 + ... + 396190.

It is an arithmetic number, because the mean of its divisors is an integer number (14257332).

Almost surely, 2^121979242 is an apocalyptic number.

121979242 is a deficient number, since it is larger than the sum of its proper divisors (106138070).

121979242 is a wasteful number, since it uses less digits than its factorization.

121979242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792093.

The product of its digits is 18144, while the sum is 37.

The square root of 121979242 is about 11044.4213067050. The cubic root of 121979242 is about 495.9394355681.

It can be divided in two parts, 121979 and 242, that added together give a palindrome (122221).

The spelling of 121979242 in words is "one hundred twenty-one million, nine hundred seventy-nine thousand, two hundred forty-two".