12201212105 has 4 divisors (see below), whose sum is σ = 14641454532. Its totient is φ = 9760969680.

The previous prime is 12201212087. The next prime is 12201212113. The reversal of 12201212105 is 50121210221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4791962176 + 7409249929 = 69224^2 + 86077^2 .

It is not a de Polignac number, because 12201212105 - 2¹⁶ = 12201146569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220121206 + ... + 1220121215.

It is an arithmetic number, because the mean of its divisors is an integer number (3660363633).

Almost surely, 2^12201212105 is an apocalyptic number.

It is an amenable number.

12201212105 is a deficient number, since it is larger than the sum of its proper divisors (2440242427).

12201212105 is an equidigital number, since it uses as much as digits as its factorization.

12201212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440242426.

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

Adding to 12201212105 its reverse (50121210221), we get a palindrome (62322422326).

The spelling of 12201212105 in words is "twelve billion, two hundred one million, two hundred twelve thousand, one hundred five".