12221210105 has 16 divisors (see below), whose sum is σ = 15797493264. Its totient is φ = 9022648320.

The previous prime is 12221210059. The next prime is 12221210137. The reversal of 12221210105 is 50101212221.

It can be written as a sum of positive squares in 8 ways, for example, as 260725609 + 11960484496 = 16147^2 + 109364^2 .

It is not a de Polignac number, because 12221210105 - 2¹⁸ = 12220947961 is a prime.

It is a super-2 number, since 2×12221210105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267497 + ... + 309833.

It is an arithmetic number, because the mean of its divisors is an integer number (987343329).

Almost surely, 2^12221210105 is an apocalyptic number.

It is an amenable number.

12221210105 is a deficient number, since it is larger than the sum of its proper divisors (3576283159).

12221210105 is a wasteful number, since it uses less digits than its factorization.

12221210105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46796.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 12221210105 its reverse (50101212221), we get a palindrome (62322422326).

The spelling of 12221210105 in words is "twelve billion, two hundred twenty-one million, two hundred ten thousand, one hundred five".