12221210123 has 4 divisors (see below), whose sum is σ = 12253456440. Its totient is φ = 12188963808.

The previous prime is 12221210059. The next prime is 12221210137. The reversal of 12221210123 is 32101212221.

12221210123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32101212221 = 13 ⋅2469324017.

It is a cyclic number.

It is not a de Polignac number, because 12221210123 - 2⁶ = 12221210059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221210173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16122590 + ... + 16123347.

It is an arithmetic number, because the mean of its divisors is an integer number (3063364110).

Almost surely, 2^12221210123 is an apocalyptic number.

12221210123 is a deficient number, since it is larger than the sum of its proper divisors (32246317).

12221210123 is an equidigital number, since it uses as much as digits as its factorization.

12221210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32246316.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12221210123 its reverse (32101212221), we get a palindrome (44322422344).

The spelling of 12221210123 in words is "twelve billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-three".