12221112001 has 12 divisors (see below), whose sum is σ = 14547011952. Its totient is φ = 10231626888.

The previous prime is 12221111993. The next prime is 12221112011. The reversal of 12221112001 is 10021112221.

It is not a de Polignac number, because 12221112001 - 2³ = 12221111993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221112011) 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 11 ways as a sum of consecutive naturals, for example, 2898015 + ... + 2902228.

It is an arithmetic number, because the mean of its divisors is an integer number (1212250996).

Almost surely, 2^12221112001 is an apocalyptic number.

It is an amenable number.

12221112001 is a deficient number, since it is larger than the sum of its proper divisors (2325899951).

12221112001 is an equidigital number, since it uses as much as digits as its factorization.

12221112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800300 (or 5800293 counting only the distinct ones).

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

Adding to 12221112001 its reverse (10021112221), we get a palindrome (22242224222).

The spelling of 12221112001 in words is "twelve billion, two hundred twenty-one million, one hundred twelve thousand, one".