12123221213 has 8 divisors (see below), whose sum is σ = 12204235008. Its totient is φ = 12042307984.

The previous prime is 12123221167. The next prime is 12123221221. The reversal of 12123221213 is 31212232121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12123221213 - 2⁸ = 12123220957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123221233) 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 7 ways as a sum of consecutive naturals, for example, 225020 + ... + 273642.

It is an arithmetic number, because the mean of its divisors is an integer number (1525529376).

Almost surely, 2^12123221213 is an apocalyptic number.

It is an amenable number.

12123221213 is a deficient number, since it is larger than the sum of its proper divisors (81013795).

12123221213 is a wasteful number, since it uses less digits than its factorization.

12123221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50283.

The product of its digits is 288, while the sum is 20.

Adding to 12123221213 its reverse (31212232121), we get a palindrome (43335453334).

The spelling of 12123221213 in words is "twelve billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred thirteen".