12111132221 has 8 divisors (see below), whose sum is σ = 12624400800. Its totient is φ = 11604239920.

The previous prime is 12111132181. The next prime is 12111132259. The reversal of 12111132221 is 12223111121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12111132221 - 2¹⁸ = 12110870077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12111132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111132281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1590191 + ... + 1597788.

It is an arithmetic number, because the mean of its divisors is an integer number (1578050100).

Almost surely, 2^12111132221 is an apocalyptic number.

It is an amenable number.

12111132221 is a deficient number, since it is larger than the sum of its proper divisors (513268579).

12111132221 is a wasteful number, since it uses less digits than its factorization.

12111132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188139.

The product of its digits is 48, while the sum is 17.

Adding to 12111132221 its reverse (12223111121), we get a palindrome (24334243342).

The spelling of 12111132221 in words is "twelve billion, one hundred eleven million, one hundred thirty-two thousand, two hundred twenty-one".