42111109 has 4 divisors (see below), whose sum is σ = 42196000. Its totient is φ = 42026220.

The previous prime is 42111101. The next prime is 42111119. The reversal of 42111109 is 90111124.

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 42111109 - 2³ = 42111101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42111101) 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, 41697 + ... + 42694.

It is an arithmetic number, because the mean of its divisors is an integer number (10549000).

Almost surely, 2^42111109 is an apocalyptic number.

It is an amenable number.

42111109 is a deficient number, since it is larger than the sum of its proper divisors (84891).

42111109 is an equidigital number, since it uses as much as digits as its factorization.

42111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84890.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 42111109 is about 6489.3072819832. The cubic root of 42111109 is about 347.9089166875.

The spelling of 42111109 in words is "forty-two million, one hundred eleven thousand, one hundred nine".