12011121223 has 4 divisors (see below), whose sum is σ = 12011344128. Its totient is φ = 12010898320.

The previous prime is 12011121209. The next prime is 12011121233. The reversal of 12011121223 is 32212111021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12011121223 - 2⁹ = 12011120711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011121197 and 12011121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011121233) 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 3 ways as a sum of consecutive naturals, for example, 25338 + ... + 157048.

It is an arithmetic number, because the mean of its divisors is an integer number (3002836032).

Almost surely, 2^12011121223 is an apocalyptic number.

12011121223 is a deficient number, since it is larger than the sum of its proper divisors (222905).

12011121223 is an equidigital number, since it uses as much as digits as its factorization.

12011121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222904.

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

Adding to 12011121223 its reverse (32212111021), we get a palindrome (44223232244).

The spelling of 12011121223 in words is "twelve billion, eleven million, one hundred twenty-one thousand, two hundred twenty-three".