12211223441 has 4 divisors (see below), whose sum is σ = 12221258532. Its totient is φ = 12201188352.

The previous prime is 12211223399. The next prime is 12211223483. The reversal of 12211223441 is 14432211221.

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

It is an interprime number because it is at equal distance from previous prime (12211223399) and next prime (12211223483).

It can be written as a sum of positive squares in 2 ways, for example, as 4446089041 + 7765134400 = 66679^2 + 88120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211223441 is a prime.

It is a super-2 number, since 2×12211223441² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211223491) 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, 5015720 + ... + 5018153.

It is an arithmetic number, because the mean of its divisors is an integer number (3055314633).

Almost surely, 2^12211223441 is an apocalyptic number.

It is an amenable number.

12211223441 is a deficient number, since it is larger than the sum of its proper divisors (10035091).

12211223441 is a wasteful number, since it uses less digits than its factorization.

12211223441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035090.

The product of its digits is 768, while the sum is 23.

Adding to 12211223441 its reverse (14432211221), we get a palindrome (26643434662).

The spelling of 12211223441 in words is "twelve billion, two hundred eleven million, two hundred twenty-three thousand, four hundred forty-one".