12230020021 has 4 divisors (see below), whose sum is σ = 12232277344. Its totient is φ = 12227762700.

The previous prime is 12230020001. The next prime is 12230020027. The reversal of 12230020021 is 12002003221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12230020021 - 2⁹ = 12230019509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12230019983 and 12230020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12230020027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120515 + ... + 1131376.

It is an arithmetic number, because the mean of its divisors is an integer number (3058069336).

Almost surely, 2^12230020021 is an apocalyptic number.

It is an amenable number.

12230020021 is a deficient number, since it is larger than the sum of its proper divisors (2257323).

12230020021 is an equidigital number, since it uses as much as digits as its factorization.

12230020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257322.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12230020021 its reverse (12002003221), we get a palindrome (24232023242).

The spelling of 12230020021 in words is "twelve billion, two hundred thirty million, twenty thousand, twenty-one".