12221434443 has 16 divisors (see below), whose sum is σ = 16738848000. Its totient is φ = 7925906016.

The previous prime is 12221434439. The next prime is 12221434481. The reversal of 12221434443 is 34443412221.

It is not a de Polignac number, because 12221434443 - 2² = 12221434439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221434443.

It is not an unprimeable number, because it can be changed into a prime (12221434403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158808 + ... + 1169306.

It is an arithmetic number, because the mean of its divisors is an integer number (1046178000).

Almost surely, 2^12221434443 is an apocalyptic number.

12221434443 is a deficient number, since it is larger than the sum of its proper divisors (4517413557).

12221434443 is a wasteful number, since it uses less digits than its factorization.

12221434443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21026.

The product of its digits is 18432, while the sum is 30.

Adding to 12221434443 its reverse (34443412221), we get a palindrome (46664846664).

It can be divided in two parts, 1222 and 1434443, that added together give a triangular number (1435665 = T₁₆₉₄).

The spelling of 12221434443 in words is "twelve billion, two hundred twenty-one million, four hundred thirty-four thousand, four hundred forty-three".