12011230840 has 96 divisors (see below), whose sum is σ = 31620170880. Its totient is φ = 4094216448.

The previous prime is 12011230811. The next prime is 12011230849. The reversal of 12011230840 is 4803211021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011230849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321369 + ... + 356791.

It is an arithmetic number, because the mean of its divisors is an integer number (329376780).

Almost surely, 2^12011230840 is an apocalyptic number.

12011230840 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 12011230840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15810085440).

12011230840 is an abundant number, since it is smaller than the sum of its proper divisors (19608940040).

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

12011230840 is a wasteful number, since it uses less digits than its factorization.

12011230840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35621 (or 35610 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12011230840 its reverse (4803211021), we get a palindrome (16814441861).

The spelling of 12011230840 in words is "twelve billion, eleven million, two hundred thirty thousand, eight hundred forty".