12212002123 has 4 divisors (see below), whose sum is σ = 12349215720. Its totient is φ = 12074788528.

The previous prime is 12212002097. The next prime is 12212002147. The reversal of 12212002123 is 32120021221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212002123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212002097 and 12212002106.

It is not an unprimeable number, because it can be changed into a prime (12212002423) 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, 68606665 + ... + 68606842.

It is an arithmetic number, because the mean of its divisors is an integer number (3087303930).

Almost surely, 2^12212002123 is an apocalyptic number.

12212002123 is a deficient number, since it is larger than the sum of its proper divisors (137213597).

12212002123 is an equidigital number, since it uses as much as digits as its factorization.

12212002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137213596.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12212002123 its reverse (32120021221), we get a palindrome (44332023344).

The spelling of 12212002123 in words is "twelve billion, two hundred twelve million, two thousand, one hundred twenty-three".