12221167405 has 8 divisors (see below), whose sum is σ = 14686325784. Its totient is φ = 9762984000.

The previous prime is 12221167379. The next prime is 12221167457. The reversal of 12221167405 is 50476112221.

12221167405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4698554116 + 7522613289 = 68546^2 + 86733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12221167405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1739886 + ... + 1746895.

It is an arithmetic number, because the mean of its divisors is an integer number (1835790723).

Almost surely, 2^12221167405 is an apocalyptic number.

It is an amenable number.

12221167405 is a deficient number, since it is larger than the sum of its proper divisors (2465158379).

12221167405 is an equidigital number, since it uses as much as digits as its factorization.

12221167405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487487.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 12221167405 its reverse (50476112221), we get a palindrome (62697279626).

The spelling of 12221167405 in words is "twelve billion, two hundred twenty-one million, one hundred sixty-seven thousand, four hundred five".