12011221100023 has 4 divisors (see below), whose sum is σ = 12011228031528. Its totient is φ = 12011214168520.

The previous prime is 12011221100009. The next prime is 12011221100041. The reversal of 12011221100023 is 32000112211021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12011221100023 - 2¹⁷ = 12011220968951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011221100083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710840 + ... + 5191282.

It is an arithmetic number, because the mean of its divisors is an integer number (3002807007882).

Almost surely, 2^{12011221100023} is an apocalyptic number.

12011221100023 is a deficient number, since it is larger than the sum of its proper divisors (6931505).

12011221100023 is an equidigital number, since it uses as much as digits as its factorization.

12011221100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6931504.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12011221100023 its reverse (32000112211021), we get a palindrome (44011333311044).

The spelling of 12011221100023 in words is "twelve trillion, eleven billion, two hundred twenty-one million, one hundred thousand, twenty-three".