12220112202221 has 32 divisors (see below), whose sum is σ = 15424290029568. Its totient is φ = 9404821923840.

The previous prime is 12220112202211. The next prime is 12220112202247. The reversal of 12220112202221 is 12220221102221.

It is not a de Polignac number, because 12220112202221 - 2¹⁸ = 12220111940077 is a prime.

It is a super-2 number, since 2×12220112202221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12220112202193 and 12220112202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220112202211) 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, 621140 + ... + 4982573.

It is an arithmetic number, because the mean of its divisors is an integer number (482009063424).

Almost surely, 2^{12220112202221} is an apocalyptic number.

12220112202221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220112202221 is a deficient number, since it is larger than the sum of its proper divisors (3204177827347).

12220112202221 is a wasteful number, since it uses less digits than its factorization.

12220112202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604081.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12220112202221 its reverse (12220221102221), we get a palindrome (24440333304442).

The spelling of 12220112202221 in words is "twelve trillion, two hundred twenty billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".