111205253231 has 4 divisors (see below), whose sum is σ = 111206266464. Its totient is φ = 111204240000.

The previous prime is 111205253221. The next prime is 111205253251. The reversal of 111205253231 is 132352502111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111205253231 - 2³⁰ = 110131511407 is a prime.

It is a super-2 number, since 2×111205253231² (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 111205253231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111205253221) 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, 318770 + ... + 569231.

It is an arithmetic number, because the mean of its divisors is an integer number (27801566616).

Almost surely, 2^111205253231 is an apocalyptic number.

111205253231 is a deficient number, since it is larger than the sum of its proper divisors (1013233).

111205253231 is an equidigital number, since it uses as much as digits as its factorization.

111205253231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013232.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 111205253231 its reverse (132352502111), we get a palindrome (243557755342).

The spelling of 111205253231 in words is "one hundred eleven billion, two hundred five million, two hundred fifty-three thousand, two hundred thirty-one".