12201221011 has 16 divisors (see below), whose sum is σ = 15273627840. Its totient is φ = 9503585280.

The previous prime is 12201221003. The next prime is 12201221017. The reversal of 12201221011 is 11012210221.

It is not a de Polignac number, because 12201221011 - 2³ = 12201221003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201220982 and 12201221000.

It is not an unprimeable number, because it can be changed into a prime (12201221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1764330 + ... + 1771231.

It is an arithmetic number, because the mean of its divisors is an integer number (954601740).

Almost surely, 2^12201221011 is an apocalyptic number.

12201221011 is a deficient number, since it is larger than the sum of its proper divisors (3072406829).

12201221011 is a wasteful number, since it uses less digits than its factorization.

12201221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535614.

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

Adding to 12201221011 its reverse (11012210221), we get a palindrome (23213431232).

The spelling of 12201221011 in words is "twelve billion, two hundred one million, two hundred twenty-one thousand, eleven".