12220403243 has 4 divisors (see below), whose sum is σ = 12220971408. Its totient is φ = 12219835080.

The previous prime is 12220403203. The next prime is 12220403249. The reversal of 12220403243 is 34230402221.

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 12220403243 - 2²⁴ = 12203626027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220403249) 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, 250496 + ... + 295277.

It is an arithmetic number, because the mean of its divisors is an integer number (3055242852).

Almost surely, 2^12220403243 is an apocalyptic number.

12220403243 is a deficient number, since it is larger than the sum of its proper divisors (568165).

12220403243 is an equidigital number, since it uses as much as digits as its factorization.

12220403243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568164.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 12220403243 its reverse (34230402221), we get a palindrome (46450805464).

The spelling of 12220403243 in words is "twelve billion, two hundred twenty million, four hundred three thousand, two hundred forty-three".