42121113 has 4 divisors (see below), whose sum is σ = 56161488. Its totient is φ = 28080740.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121113 is 31112124.

42121113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 42121113 - 2⁴ = 42121097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42121092 and 42121101.

It is not an unprimeable number, because it can be changed into a prime (42121153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7020183 + ... + 7020188.

It is an arithmetic number, because the mean of its divisors is an integer number (14040372).

Almost surely, 2^42121113 is an apocalyptic number.

It is an amenable number.

42121113 is a deficient number, since it is larger than the sum of its proper divisors (14040375).

42121113 is a wasteful number, since it uses less digits than its factorization.

42121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040374.

The product of its digits is 48, while the sum is 15.

The square root of 42121113 is about 6490.0780426741. The cubic root of 42121113 is about 347.9364644875.

Adding to 42121113 its reverse (31112124), we get a palindrome (73233237).

The spelling of 42121113 in words is "forty-two million, one hundred twenty-one thousand, one hundred thirteen".