12011213223 has 28 divisors (see below), whose sum is σ = 18956423640. Its totient is φ = 7586020656.

The previous prime is 12011213161. The next prime is 12011213231. The reversal of 12011213223 is 32231211021.

It is not a de Polignac number, because 12011213223 - 2³⁰ = 10937471399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011213196 and 12011213205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011213233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 419736 + ... + 447437.

It is an arithmetic number, because the mean of its divisors is an integer number (677015130).

Almost surely, 2^12011213223 is an apocalyptic number.

12011213223 is a deficient number, since it is larger than the sum of its proper divisors (6945210417).

12011213223 is an frugal number, since it uses more digits than its factorization.

12011213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867210 (or 867195 counting only the distinct ones).

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

Adding to 12011213223 its reverse (32231211021), we get a palindrome (44242424244).

The spelling of 12011213223 in words is "twelve billion, eleven million, two hundred thirteen thousand, two hundred twenty-three".