12023133221 has 16 divisors (see below), whose sum is σ = 13344652800. Its totient is φ = 10739871600.

The previous prime is 12023133209. The next prime is 12023133251. The reversal of 12023133221 is 12233132021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12023133221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12023133193 and 12023133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023133251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2735936 + ... + 2740326.

It is an arithmetic number, because the mean of its divisors is an integer number (834040800).

Almost surely, 2^12023133221 is an apocalyptic number.

12023133221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12023133221 is a deficient number, since it is larger than the sum of its proper divisors (1321519579).

12023133221 is a wasteful number, since it uses less digits than its factorization.

12023133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12023133221 its reverse (12233132021), we get a palindrome (24256265242).

The spelling of 12023133221 in words is "twelve billion, twenty-three million, one hundred thirty-three thousand, two hundred twenty-one".