121313242 has 4 divisors (see below), whose sum is σ = 181969866. Its totient is φ = 60656620.

The previous prime is 121313197. The next prime is 121313243. The reversal of 121313242 is 242313121.

It is a happy number.

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., 120978001 + 335241 = 10999^2 + 579^2 .

It is not an unprimeable number, because it can be changed into a prime (121313243) 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 as a sum of consecutive naturals, namely, 30328309 + ... + 30328312.

Almost surely, 2^121313242 is an apocalyptic number.

121313242 is a deficient number, since it is larger than the sum of its proper divisors (60656624).

121313242 is an equidigital number, since it uses as much as digits as its factorization.

121313242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60656623.

The product of its digits is 288, while the sum is 19.

The square root of 121313242 is about 11014.2290697080. The cubic root of 121313242 is about 495.0351871052.

Adding to 121313242 its reverse (242313121), we get a palindrome (363626363).

The spelling of 121313242 in words is "one hundred twenty-one million, three hundred thirteen thousand, two hundred forty-two".