111123420 has 24 divisors (see below), whose sum is σ = 311145744. Its totient is φ = 29632896.

The previous prime is 111123403. The next prime is 111123433. The reversal of 111123420 is 24321111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111123420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925969 + ... + 926088.

It is an arithmetic number, because the mean of its divisors is an integer number (12964406).

Almost surely, 2^111123420 is an apocalyptic number.

111123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111123420 is an abundant number, since it is smaller than the sum of its proper divisors (200022324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111123420 is a wasteful number, since it uses less digits than its factorization.

111123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852069 (or 1852067 counting only the distinct ones).

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

The square root of 111123420 is about 10541.5093795908. The cubic root of 111123420 is about 480.7676086033.

Adding to 111123420 its reverse (24321111), we get a palindrome (135444531).

It can be divided in two parts, 1111 and 23420, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 111123420 in words is "one hundred eleven million, one hundred twenty-three thousand, four hundred twenty".