121842418 has 4 divisors (see below), whose sum is σ = 182763630. Its totient is φ = 60921208.

The previous prime is 121842367. The next prime is 121842433. The reversal of 121842418 is 814248121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 110733529 + 11108889 = 10523^2 + 3333^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 121842418.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30460603 + ... + 30460606.

Almost surely, 2^121842418 is an apocalyptic number.

121842418 is a deficient number, since it is larger than the sum of its proper divisors (60921212).

121842418 is an equidigital number, since it uses as much as digits as its factorization.

121842418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60921211.

The product of its digits is 4096, while the sum is 31.

The square root of 121842418 is about 11038.2253102571. The cubic root of 121842418 is about 495.7539345940.

The spelling of 121842418 in words is "one hundred twenty-one million, eight hundred forty-two thousand, four hundred eighteen".