12011322312 has 96 divisors (see below), whose sum is σ = 36711792000. Its totient is φ = 3514277760.

The previous prime is 12011322293. The next prime is 12011322437. The reversal of 12011322312 is 21322311021.

12011322312 is a `hidden beast` number, since 1 + 20 + 11 + 322 + 312 = 666.

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

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, 238512 + ... + 284447.

It is an arithmetic number, because the mean of its divisors is an integer number (382414500).

Almost surely, 2^12011322312 is an apocalyptic number.

12011322312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011322312 is an abundant number, since it is smaller than the sum of its proper divisors (24700469688).

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

12011322312 is a wasteful number, since it uses less digits than its factorization.

12011322312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523011 (or 523004 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12011322312 its reverse (21322311021), we get a palindrome (33333633333).

The spelling of 12011322312 in words is "twelve billion, eleven million, three hundred twenty-two thousand, three hundred twelve".