12221124211 has 4 divisors (see below), whose sum is σ = 12231369432. Its totient is φ = 12210878992.

The previous prime is 12221124151. The next prime is 12221124217. The reversal of 12221124211 is 11242112221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11242112221 = 22777 ⋅493573.

It is a cyclic number.

It is not a de Polignac number, because 12221124211 - 2¹⁷ = 12220993139 is a prime.

It is a super-3 number, since 3×12221124211³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221124217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120821 + ... + 5123206.

It is an arithmetic number, because the mean of its divisors is an integer number (3057842358).

Almost surely, 2^12221124211 is an apocalyptic number.

12221124211 is a deficient number, since it is larger than the sum of its proper divisors (10245221).

12221124211 is a wasteful number, since it uses less digits than its factorization.

12221124211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10245220.

The product of its digits is 128, while the sum is 19.

Adding to 12221124211 its reverse (11242112221), we get a palindrome (23463236432).

The spelling of 12221124211 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-four thousand, two hundred eleven".