111434021 has 4 divisors (see below), whose sum is σ = 111463200. Its totient is φ = 111404844.

The previous prime is 111434017. The next prime is 111434051. The reversal of 111434021 is 120434111.

It is a happy number.

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 111434021 - 2² = 111434017 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 (111434051) 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, 7811 + ... + 16848.

It is an arithmetic number, because the mean of its divisors is an integer number (27865800).

Almost surely, 2^111434021 is an apocalyptic number.

It is an amenable number.

111434021 is a deficient number, since it is larger than the sum of its proper divisors (29179).

111434021 is an equidigital number, since it uses as much as digits as its factorization.

111434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29178.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 111434021 is about 10556.2313824584. The cubic root of 111434021 is about 481.2151229911.

Adding to 111434021 its reverse (120434111), we get a palindrome (231868132).

The spelling of 111434021 in words is "one hundred eleven million, four hundred thirty-four thousand, twenty-one".