11231311240 has 64 divisors (see below), whose sum is σ = 26390707200. Its totient is φ = 4293687552.

The previous prime is 11231311229. The next prime is 11231311241. The reversal of 11231311240 is 4211313211.

It is a super-2 number, since 2×11231311240² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231311241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1310409 + ... + 1318951.

It is an arithmetic number, because the mean of its divisors is an integer number (412354800).

Almost surely, 2^11231311240 is an apocalyptic number.

11231311240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11231311240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13195353600).

11231311240 is an abundant number, since it is smaller than the sum of its proper divisors (15159395960).

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

11231311240 is a wasteful number, since it uses less digits than its factorization.

11231311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006 (or 10002 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11231311240 its reverse (4211313211), we get a palindrome (15442624451).

The spelling of 11231311240 in words is "eleven billion, two hundred thirty-one million, three hundred eleven thousand, two hundred forty".