12213132111221 has 4 divisors (see below), whose sum is σ = 12213250683744. Its totient is φ = 12213013538700.

The previous prime is 12213132111209. The next prime is 12213132111239. The reversal of 12213132111221 is 12211123131221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213132111221 is a prime.

It is a super-2 number, since 2×12213132111221² (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 (12213132111251) 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, 59131625 + ... + 59337806.

It is an arithmetic number, because the mean of its divisors is an integer number (3053312670936).

Almost surely, 2^{12213132111221} is an apocalyptic number.

It is an amenable number.

12213132111221 is a deficient number, since it is larger than the sum of its proper divisors (118572523).

12213132111221 is a wasteful number, since it uses less digits than its factorization.

12213132111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118572522.

The product of its digits is 288, while the sum is 23.

Adding to 12213132111221 its reverse (12211123131221), we get a palindrome (24424255242442).

The spelling of 12213132111221 in words is "twelve trillion, two hundred thirteen billion, one hundred thirty-two million, one hundred eleven thousand, two hundred twenty-one".