12011230816 has 24 divisors (see below), whose sum is σ = 25466120064. Its totient is φ = 5543644800.

The previous prime is 12011230811. The next prime is 12011230849. The reversal of 12011230816 is 61803211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011230811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14436160 + ... + 14436991.

It is an arithmetic number, because the mean of its divisors is an integer number (1061088336).

Almost surely, 2^12011230816 is an apocalyptic number.

12011230816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12011230816 is an abundant number, since it is smaller than the sum of its proper divisors (13454889248).

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

12011230816 is a wasteful number, since it uses less digits than its factorization.

12011230816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28873174 (or 28873166 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 12011230816 its reverse (61803211021), we get a palindrome (73814441837).

The spelling of 12011230816 in words is "twelve billion, eleven million, two hundred thirty thousand, eight hundred sixteen".