1111312103231 has 32 divisors (see below), whose sum is σ = 1256385081600. Its totient is φ = 974236032000.

The previous prime is 1111312103201. The next prime is 1111312103257. The reversal of 1111312103231 is 1323012131111.

It is a de Polignac number, because none of the positive numbers 2^k-1111312103231 is a prime.

It is a super-2 number, since 2×1111312103231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111312103201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16830920 + ... + 16896818.

It is an arithmetic number, because the mean of its divisors is an integer number (39262033800).

Almost surely, 2^{1111312103231} is an apocalyptic number.

1111312103231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111312103231 is a deficient number, since it is larger than the sum of its proper divisors (145072978369).

1111312103231 is a wasteful number, since it uses less digits than its factorization.

1111312103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66407.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1111312103231 its reverse (1323012131111), we get a palindrome (2434324234342).

The spelling of 1111312103231 in words is "one trillion, one hundred eleven billion, three hundred twelve million, one hundred three thousand, two hundred thirty-one".