12201221101 has 4 divisors (see below), whose sum is σ = 12201802912. Its totient is φ = 12200639292.

The previous prime is 12201221083. The next prime is 12201221111. The reversal of 12201221101 is 10112210221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12201221101 - 2¹⁷ = 12201090029 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 (12201221111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258225 + ... + 301798.

It is an arithmetic number, because the mean of its divisors is an integer number (3050450728).

Almost surely, 2^12201221101 is an apocalyptic number.

It is an amenable number.

12201221101 is a deficient number, since it is larger than the sum of its proper divisors (581811).

12201221101 is an equidigital number, since it uses as much as digits as its factorization.

12201221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581810.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12201221101 its reverse (10112210221), we get a palindrome (22313431322).

The spelling of 12201221101 in words is "twelve billion, two hundred one million, two hundred twenty-one thousand, one hundred one".