111012231231 has 12 divisors (see below), whose sum is σ = 174928364520. Its totient is φ = 67280140080.

The previous prime is 111012231173. The next prime is 111012231293. The reversal of 111012231231 is 132132210111.

It is not a de Polignac number, because 111012231231 - 2⁶ = 111012231167 is a prime.

It is a super-2 number, since 2×111012231231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012231331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560667736 + ... + 560667933.

It is an arithmetic number, because the mean of its divisors is an integer number (14577363710).

Almost surely, 2^111012231231 is an apocalyptic number.

111012231231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111012231231 is a deficient number, since it is larger than the sum of its proper divisors (63916133289).

111012231231 is a wasteful number, since it uses less digits than its factorization.

111012231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121335686 (or 1121335683 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111012231231 its reverse (132132210111), we get a palindrome (243144441342).

It can be divided in two parts, 111012 and 231231, that added together give a palindrome (342243).

The spelling of 111012231231 in words is "one hundred eleven billion, twelve million, two hundred thirty-one thousand, two hundred thirty-one".