111204504431 has 4 divisors (see below), whose sum is σ = 113089326600. Its totient is φ = 109319682264.

The previous prime is 111204504427. The next prime is 111204504461. The reversal of 111204504431 is 134405402111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134405402111 = 2083 ⋅64524917.

It is a cyclic number.

It is not a de Polignac number, because 111204504431 - 2² = 111204504427 is a prime.

It is a super-2 number, since 2×111204504431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111204504431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111204504461) 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, 942410996 + ... + 942411113.

It is an arithmetic number, because the mean of its divisors is an integer number (28272331650).

Almost surely, 2^111204504431 is an apocalyptic number.

111204504431 is a deficient number, since it is larger than the sum of its proper divisors (1884822169).

111204504431 is an equidigital number, since it uses as much as digits as its factorization.

111204504431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884822168.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 111204504431 its reverse (134405402111), we get a palindrome (245609906542).

The spelling of 111204504431 in words is "one hundred eleven billion, two hundred four million, five hundred four thousand, four hundred thirty-one".