112742121 has 4 divisors (see below), whose sum is σ = 150322832. Its totient is φ = 75161412.

The previous prime is 112742117. The next prime is 112742131. The reversal of 112742121 is 121247211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121247211 = 3 ⋅40415737.

It is not a de Polignac number, because 112742121 - 2² = 112742117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112742101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18790351 + ... + 18790356.

It is an arithmetic number, because the mean of its divisors is an integer number (37580708).

Almost surely, 2^112742121 is an apocalyptic number.

It is an amenable number.

112742121 is a deficient number, since it is larger than the sum of its proper divisors (37580711).

112742121 is an equidigital number, since it uses as much as digits as its factorization.

112742121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37580710.

The product of its digits is 224, while the sum is 21.

The square root of 112742121 is about 10618.0092766959. The cubic root of 112742121 is about 483.0907630485.

Adding to 112742121 its reverse (121247211), we get a palindrome (233989332).

The spelling of 112742121 in words is "one hundred twelve million, seven hundred forty-two thousand, one hundred twenty-one".