431111121 has 16 divisors (see below), whose sum is σ = 691507200. Its totient is φ = 233383248.

The previous prime is 431111113. The next prime is 431111147. The reversal of 431111121 is 121111134.

It is not a de Polignac number, because 431111121 - 2³ = 431111113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 431111121.

It is not an unprimeable number, because it can be changed into a prime (431111111) 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, 539841 + ... + 540638.

It is an arithmetic number, because the mean of its divisors is an integer number (43219200).

Almost surely, 2^431111121 is an apocalyptic number.

It is an amenable number.

431111121 is a deficient number, since it is larger than the sum of its proper divisors (260396079).

431111121 is a wasteful number, since it uses less digits than its factorization.

431111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080508.

The product of its digits is 24, while the sum is 15.

The square root of 431111121 is about 20763.2155746647. The cubic root of 431111121 is about 755.4337936626.

Adding to 431111121 its reverse (121111134), we get a palindrome (552222255).

The spelling of 431111121 in words is "four hundred thirty-one million, one hundred eleven thousand, one hundred twenty-one".