12123110213 has 4 divisors (see below), whose sum is σ = 12128308908. Its totient is φ = 12117911520.

The previous prime is 12123110191. The next prime is 12123110239. The reversal of 12123110213 is 31201132121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8959947649 + 3163162564 = 94657^2 + 56242^2 .

It is a cyclic number.

It is not a de Polignac number, because 12123110213 - 2²⁸ = 11854674757 is a prime.

It is a super-3 number, since 3×12123110213³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12123110191 and 12123110200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123110243) 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, 2595848 + ... + 2600513.

It is an arithmetic number, because the mean of its divisors is an integer number (3032077227).

Almost surely, 2^12123110213 is an apocalyptic number.

It is an amenable number.

12123110213 is a deficient number, since it is larger than the sum of its proper divisors (5198695).

12123110213 is an equidigital number, since it uses as much as digits as its factorization.

12123110213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198694.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12123110213 its reverse (31201132121), we get a palindrome (43324242334).

The spelling of 12123110213 in words is "twelve billion, one hundred twenty-three million, one hundred ten thousand, two hundred thirteen".