12012221223 has 6 divisors (see below), whose sum is σ = 17350986224. Its totient is φ = 8008147476.

The previous prime is 12012221197. The next prime is 12012221227. The reversal of 12012221223 is 32212221021.

It is not a de Polignac number, because 12012221223 - 2⁶ = 12012221159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012221196 and 12012221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012221227) 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 5 ways as a sum of consecutive naturals, for example, 667345615 + ... + 667345632.

Almost surely, 2^12012221223 is an apocalyptic number.

12012221223 is a deficient number, since it is larger than the sum of its proper divisors (5338765001).

12012221223 is a wasteful number, since it uses less digits than its factorization.

12012221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334691253 (or 1334691250 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12012221223 its reverse (32212221021), we get a palindrome (44224442244).

The spelling of 12012221223 in words is "twelve billion, twelve million, two hundred twenty-one thousand, two hundred twenty-three".