12202222121 has 4 divisors (see below), whose sum is σ = 12203095812. Its totient is φ = 12201348432.

The previous prime is 12202222069. The next prime is 12202222147. The reversal of 12202222121 is 12122220221.

It is a happy number.

12202222121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12122220221 = 2221 ⋅5458001.

It can be written as a sum of positive squares in 2 ways, for example, as 11910666496 + 291555625 = 109136^2 + 17075^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202222121 - 2¹⁴ = 12202205737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12202222121.

It is not an unprimeable number, because it can be changed into a prime (12202242121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415550 + ... + 443943.

It is an arithmetic number, because the mean of its divisors is an integer number (3050773953).

Almost surely, 2^12202222121 is an apocalyptic number.

It is an amenable number.

12202222121 is a deficient number, since it is larger than the sum of its proper divisors (873691).

12202222121 is an equidigital number, since it uses as much as digits as its factorization.

12202222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873690.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12202222121 its reverse (12122220221), we get a palindrome (24324442342).

The spelling of 12202222121 in words is "twelve billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty-one".