11312103231 has 48 divisors (see below), whose sum is σ = 19216858752. Its totient is φ = 6321672000.

The previous prime is 11312103221. The next prime is 11312103247. The reversal of 11312103231 is 13230121311.

11312103231 is a `hidden beast` number, since 1 + 131 + 210 + 323 + 1 = 666.

It is not a de Polignac number, because 11312103231 - 2¹¹ = 11312101183 is a prime.

It is a super-2 number, since 2×11312103231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312103211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1348456 + ... + 1356818.

It is an arithmetic number, because the mean of its divisors is an integer number (400351224).

Almost surely, 2^11312103231 is an apocalyptic number.

11312103231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11312103231 is a deficient number, since it is larger than the sum of its proper divisors (7904755521).

11312103231 is a wasteful number, since it uses less digits than its factorization.

11312103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444 (or 9441 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11312103231 its reverse (13230121311), we get a palindrome (24542224542).

The spelling of 11312103231 in words is "eleven billion, three hundred twelve million, one hundred three thousand, two hundred thirty-one".