12221212133 has 4 divisors (see below), whose sum is σ = 13161305388. Its totient is φ = 11281118880.

The previous prime is 12221212109. The next prime is 12221212169. The reversal of 12221212133 is 33121212221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1550941924 + 10670270209 = 39382^2 + 103297^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221212133 - 2¹⁰ = 12221211109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221215133) 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, 470046608 + ... + 470046633.

It is an arithmetic number, because the mean of its divisors is an integer number (3290326347).

Almost surely, 2^12221212133 is an apocalyptic number.

12221212133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12221212133 is a deficient number, since it is larger than the sum of its proper divisors (940093255).

12221212133 is an equidigital number, since it uses as much as digits as its factorization.

12221212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940093254.

The product of its digits is 288, while the sum is 20.

Adding to 12221212133 its reverse (33121212221), we get a palindrome (45342424354).

The spelling of 12221212133 in words is "twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred thirty-three".