111100042 has 4 divisors (see below), whose sum is σ = 166650066. Its totient is φ = 55550020.

The previous prime is 111100027. The next prime is 111100061. The reversal of 111100042 is 240001111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240001111 = 7 ⋅34285873.

It can be written as a sum of positive squares in only one way, i.e., 90041121 + 21058921 = 9489^2 + 4589^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775009 + ... + 27775012.

Almost surely, 2^111100042 is an apocalyptic number.

111100042 is a deficient number, since it is larger than the sum of its proper divisors (55550024).

111100042 is an equidigital number, since it uses as much as digits as its factorization.

111100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55550023.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 111100042 is about 10540.4004667754. The cubic root of 111100042 is about 480.7338918182.

Adding to 111100042 its reverse (240001111), we get a palindrome (351101153).

The spelling of 111100042 in words is "one hundred eleven million, one hundred thousand, forty-two".