12330001221 has 4 divisors (see below), whose sum is σ = 16440001632. Its totient is φ = 8220000812.

The previous prime is 12330001199. The next prime is 12330001237. The reversal of 12330001221 is 12210003321.

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 12330001221 - 2²⁶ = 12262892357 is a prime.

It is a super-2 number, since 2×12330001221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12330001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12330001241) 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, 2055000201 + ... + 2055000206.

It is an arithmetic number, because the mean of its divisors is an integer number (4110000408).

Almost surely, 2^12330001221 is an apocalyptic number.

It is an amenable number.

12330001221 is a deficient number, since it is larger than the sum of its proper divisors (4110000411).

12330001221 is an equidigital number, since it uses as much as digits as its factorization.

12330001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110000410.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12330001221 its reverse (12210003321), we get a palindrome (24540004542).

The spelling of 12330001221 in words is "twelve billion, three hundred thirty million, one thousand, two hundred twenty-one".