111112428 has 24 divisors (see below), whose sum is σ = 296300032. Its totient is φ = 31746384.

The previous prime is 111112411. The next prime is 111112447. The reversal of 111112428 is 824211111.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 661300 + ... + 661467.

Almost surely, 2^111112428 is an apocalyptic number.

It is an amenable number.

111112428 is an abundant number, since it is smaller than the sum of its proper divisors (185187604).

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

111112428 is a wasteful number, since it uses less digits than its factorization.

111112428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322781 (or 1322779 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

The square root of 111112428 is about 10540.9879992342. The cubic root of 111112428 is about 480.7517560441.

Adding to 111112428 its reverse (824211111), we get a palindrome (935323539).

The spelling of 111112428 in words is "one hundred eleven million, one hundred twelve thousand, four hundred twenty-eight".