111204406 has 4 divisors (see below), whose sum is σ = 166806612. Its totient is φ = 55602202.

The previous prime is 111204391. The next prime is 111204421. The reversal of 111204406 is 604402111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604402111 = 2887 ⋅209353.

It is an interprime number because it is at equal distance from previous prime (111204391) and next prime (111204421).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27801100 + ... + 27801103.

It is an arithmetic number, because the mean of its divisors is an integer number (41701653).

Almost surely, 2^111204406 is an apocalyptic number.

111204406 is a deficient number, since it is larger than the sum of its proper divisors (55602206).

111204406 is an equidigital number, since it uses as much as digits as its factorization.

111204406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55602205.

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

The square root of 111204406 is about 10545.3499704846. The cubic root of 111204406 is about 480.8843736404.

Adding to 111204406 its reverse (604402111), we get a palindrome (715606517).

The spelling of 111204406 in words is "one hundred eleven million, two hundred four thousand, four hundred six".