13221212101 has 4 divisors (see below), whose sum is σ = 13338214092. Its totient is φ = 13104210112.

The previous prime is 13221212057. The next prime is 13221212113. The reversal of 13221212101 is 10121212231.

13221212101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 955428100 + 12265784001 = 30910^2 + 110751^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221212101 - 2⁷ = 13221211973 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 (13221212131) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58500826 + ... + 58501051.

It is an arithmetic number, because the mean of its divisors is an integer number (3334553523).

Almost surely, 2^13221212101 is an apocalyptic number.

It is an amenable number.

13221212101 is a deficient number, since it is larger than the sum of its proper divisors (117001991).

13221212101 is a wasteful number, since it uses less digits than its factorization.

13221212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117001990.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13221212101 its reverse (10121212231), we get a palindrome (23342424332).

The spelling of 13221212101 in words is "thirteen billion, two hundred twenty-one million, two hundred twelve thousand, one hundred one".