12211244211221 has 32 divisors (see below), whose sum is σ = 14117820189696. Its totient is φ = 10438606944000.

The previous prime is 12211244211157. The next prime is 12211244211253.

12211244211221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12211244211221 - 2⁶ = 12211244211157 is a prime.

It is a super-2 number, since 2×12211244211221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211244211521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1343218886 + ... + 1343227976.

It is an arithmetic number, because the mean of its divisors is an integer number (441181880928).

Almost surely, 2^{12211244211221} is an apocalyptic number.

12211244211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211244211221 is a deficient number, since it is larger than the sum of its proper divisors (1906575978475).

12211244211221 is a wasteful number, since it uses less digits than its factorization.

12211244211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14873.

The product of its digits is 1024, while the sum is 26.

It can be divided in two parts, 1221124 and 4211221, that added together give a palindrome (5432345).

The spelling of 12211244211221 in words is "twelve trillion, two hundred eleven billion, two hundred forty-four million, two hundred eleven thousand, two hundred twenty-one".