11231320158 has 96 divisors (see below), whose sum is σ = 25863364800. Its totient is φ = 3516172800.

The previous prime is 11231320157. The next prime is 11231320159. The reversal of 11231320158 is 85102313211.

11231320158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11231320157) and next prime (11231320159).

It is a super-2 number, since 2×11231320158² (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 (11231320157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10893103 + ... + 10894133.

It is an arithmetic number, because the mean of its divisors is an integer number (269410050).

Almost surely, 2^11231320158 is an apocalyptic number.

11231320158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11231320158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12931682400).

11231320158 is an abundant number, since it is smaller than the sum of its proper divisors (14632044642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231320158 is a wasteful number, since it uses less digits than its factorization.

11231320158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 11231320158 its reverse (85102313211), we get a palindrome (96333633369).

The spelling of 11231320158 in words is "eleven billion, two hundred thirty-one million, three hundred twenty thousand, one hundred fifty-eight".