12211200112221 has 40 divisors (see below), whose sum is σ = 19901954496864. Its totient is φ = 7399901357280.

The previous prime is 12211200112219. The next prime is 12211200112229. The reversal of 12211200112221 is 12221100211221.

12211200112221 is a `hidden beast` number, since 122 + 11 + 200 + 112 + 221 = 666.

It is not a de Polignac number, because 12211200112221 - 2¹ = 12211200112219 is a prime.

It is a super-2 number, since 2×12211200112221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211200112194 and 12211200112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211200112229) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7270290 + ... + 8790876.

Almost surely, 2^{12211200112221} is an apocalyptic number.

12211200112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211200112221 is a deficient number, since it is larger than the sum of its proper divisors (7690754384643).

12211200112221 is a wasteful number, since it uses less digits than its factorization.

12211200112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529623 (or 1529614 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12211200112221 its reverse (12221100211221), we get a palindrome (24432300323442).

The spelling of 12211200112221 in words is "twelve trillion, two hundred eleven billion, two hundred million, one hundred twelve thousand, two hundred twenty-one".