12212723 has 4 divisors (see below), whose sum is σ = 12231288. Its totient is φ = 12194160.

The previous prime is 12212719. The next prime is 12212743. The reversal of 12212723 is 32721221.

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 12212723 - 2² = 12212719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212695 and 12212704.

It is not an unprimeable number, because it can be changed into a prime (12212713) 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, 8258 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (3057822).

Almost surely, 2^12212723 is an apocalyptic number.

12212723 is a deficient number, since it is larger than the sum of its proper divisors (18565).

12212723 is an equidigital number, since it uses as much as digits as its factorization.

12212723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18564.

The product of its digits is 336, while the sum is 20.

The square root of 12212723 is about 3494.6706568717. The cubic root of 12212723 is about 230.2877494917.

Adding to 12212723 its reverse (32721221), we get a palindrome (44933944).

The spelling of 12212723 in words is "twelve million, two hundred twelve thousand, seven hundred twenty-three".