12011231323 has 32 divisors (see below), whose sum is σ = 16016749056. Its totient is φ = 8736311808.

The previous prime is 12011231299. The next prime is 12011231341. The reversal of 12011231323 is 32313211021.

It is not a de Polignac number, because 12011231323 - 2⁹ = 12011230811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011231323.

It is not an unprimeable number, because it can be changed into a prime (12011232323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23761 + ... + 156802.

It is an arithmetic number, because the mean of its divisors is an integer number (500523408).

Almost surely, 2^12011231323 is an apocalyptic number.

12011231323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12011231323 is a deficient number, since it is larger than the sum of its proper divisors (4005517733).

12011231323 is a wasteful number, since it uses less digits than its factorization.

12011231323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180643.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12011231323 its reverse (32313211021), we get a palindrome (44324442344).

The spelling of 12011231323 in words is "twelve billion, eleven million, two hundred thirty-one thousand, three hundred twenty-three".