12221330013 has 6 divisors (see below), whose sum is σ = 17653032254. Its totient is φ = 8147553336.

The previous prime is 12221330003. The next prime is 12221330027. The reversal of 12221330013 is 31003312221.

It can be written as a sum of positive squares in only one way, i.e., 7492979844 + 4728350169 = 86562^2 + 68763^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12221330013 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 (12221330003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678962770 + ... + 678962787.

Almost surely, 2^12221330013 is an apocalyptic number.

It is an amenable number.

12221330013 is a deficient number, since it is larger than the sum of its proper divisors (5431702241).

12221330013 is a wasteful number, since it uses less digits than its factorization.

12221330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357925563 (or 1357925560 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12221330013 its reverse (31003312221), we get a palindrome (43224642234).

The spelling of 12221330013 in words is "twelve billion, two hundred twenty-one million, three hundred thirty thousand, thirteen".