11231312256 has 256 divisors, whose sum is σ = 34235524800. Its totient is φ = 3668281344.

The previous prime is 11231312227. The next prime is 11231312273. The reversal of 11231312256 is 65221313211.

It is a super-2 number, since 2×11231312256² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14836230 + ... + 14836986.

Almost surely, 2^11231312256 is an apocalyptic number.

11231312256 is a gapful number since it is divisible by the number (16) 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 11231312256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17117762400).

11231312256 is an abundant number, since it is smaller than the sum of its proper divisors (23004212544).

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

11231312256 is an frugal number, since it uses more digits than its factorization.

11231312256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 815 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 11231312256 its reverse (65221313211), we get a palindrome (76452625467).

The spelling of 11231312256 in words is "eleven billion, two hundred thirty-one million, three hundred twelve thousand, two hundred fifty-six".