12221121203 has 4 divisors (see below), whose sum is σ = 12505333368. Its totient is φ = 11936909040.

The previous prime is 12221121197. The next prime is 12221121221. The reversal of 12221121203 is 30212112221.

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 12221121203 - 2¹⁰ = 12221120179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221120203) 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, 142106018 + ... + 142106103.

It is an arithmetic number, because the mean of its divisors is an integer number (3126333342).

Almost surely, 2^12221121203 is an apocalyptic number.

12221121203 is a deficient number, since it is larger than the sum of its proper divisors (284212165).

12221121203 is an equidigital number, since it uses as much as digits as its factorization.

12221121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284212164.

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

Adding to 12221121203 its reverse (30212112221), we get a palindrome (42433233424).

The spelling of 12221121203 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred three".