11421111312 has 120 divisors (see below), whose sum is σ = 34673994264. Its totient is φ = 3488458752.

The previous prime is 11421111287. The next prime is 11421111329. The reversal of 11421111312 is 21311112411.

It can be written as a sum of positive squares in 4 ways, for example, as 877107456 + 10544003856 = 29616^2 + 102684^2 .

It is a super-2 number, since 2×11421111312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234198 + ... + 278730.

Almost surely, 2^11421111312 is an apocalyptic number.

11421111312 is a gapful number since it is divisible by the number (12) 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 11421111312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17336997132).

11421111312 is an abundant number, since it is smaller than the sum of its proper divisors (23252882952).

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

11421111312 is a wasteful number, since it uses less digits than its factorization.

11421111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44697 (or 44688 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 11421111312 its reverse (21311112411), we get a palindrome (32732223723).

The spelling of 11421111312 in words is "eleven billion, four hundred twenty-one million, one hundred eleven thousand, three hundred twelve".