111434421 has 16 divisors (see below), whose sum is σ = 172684800. Its totient is φ = 62596848.

The previous prime is 111434419. The next prime is 111434447. The reversal of 111434421 is 124434111.

It is not a de Polignac number, because 111434421 - 2¹ = 111434419 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111434621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43731 + ... + 46208.

It is an arithmetic number, because the mean of its divisors is an integer number (10792800).

Almost surely, 2^111434421 is an apocalyptic number.

It is an amenable number.

111434421 is a deficient number, since it is larger than the sum of its proper divisors (61250379).

111434421 is an equidigital number, since it uses as much as digits as its factorization.

111434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90008.

The product of its digits is 384, while the sum is 21.

The square root of 111434421 is about 10556.2503285968. The cubic root of 111434421 is about 481.2156987752.

Adding to 111434421 its reverse (124434111), we get a palindrome (235868532).

The spelling of 111434421 in words is "one hundred eleven million, four hundred thirty-four thousand, four hundred twenty-one".