12102121223 has 4 divisors (see below), whose sum is σ = 12102857928. Its totient is φ = 12101384520.

The previous prime is 12102121189. The next prime is 12102121253. The reversal of 12102121223 is 32212120121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12102121223 - 2⁶ = 12102121159 is a prime.

It is a super-2 number, since 2×12102121223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102121253) 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 3 ways as a sum of consecutive naturals, for example, 343136 + ... + 376757.

It is an arithmetic number, because the mean of its divisors is an integer number (3025714482).

Almost surely, 2^12102121223 is an apocalyptic number.

12102121223 is a deficient number, since it is larger than the sum of its proper divisors (736705).

12102121223 is an equidigital number, since it uses as much as digits as its factorization.

12102121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736704.

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

Adding to 12102121223 its reverse (32212120121), we get a palindrome (44314241344).

The spelling of 12102121223 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-three".