121442113 has 8 divisors (see below), whose sum is σ = 130892328. Its totient is φ = 112007424.

The previous prime is 121442107. The next prime is 121442149. The reversal of 121442113 is 311244121.

It can be written as a sum of positive squares in 4 ways, for example, as 56430144 + 65011969 = 7512^2 + 8063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121442113 - 2²¹ = 119344961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121442173) 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, 16281 + ... + 22537.

It is an arithmetic number, because the mean of its divisors is an integer number (16361541).

Almost surely, 2^121442113 is an apocalyptic number.

121442113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121442113 is a deficient number, since it is larger than the sum of its proper divisors (9450215).

121442113 is a wasteful number, since it uses less digits than its factorization.

121442113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7763.

The product of its digits is 192, while the sum is 19.

The square root of 121442113 is about 11020.0777220490. The cubic root of 121442113 is about 495.2104169532.

Adding to 121442113 its reverse (311244121), we get a palindrome (432686234).

The spelling of 121442113 in words is "one hundred twenty-one million, four hundred forty-two thousand, one hundred thirteen".