12221201111 has 16 divisors (see below), whose sum is σ = 14804904960. Its totient is φ = 9848304000.

The previous prime is 12221201107. The next prime is 12221201119. The reversal of 12221201111 is 11110212221.

It is not a de Polignac number, because 12221201111 - 2² = 12221201107 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 (12221201119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53486 + ... + 165236.

It is an arithmetic number, because the mean of its divisors is an integer number (925306560).

Almost surely, 2^12221201111 is an apocalyptic number.

12221201111 is a deficient number, since it is larger than the sum of its proper divisors (2583703849).

12221201111 is a wasteful number, since it uses less digits than its factorization.

12221201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112694.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12221201111 its reverse (11110212221), we get a palindrome (23331413332).

The spelling of 12221201111 in words is "twelve billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".