12111233220221 has 8 divisors (see below), whose sum is σ = 12131847816000. Its totient is φ = 12090619944000.

The previous prime is 12111233220211. The next prime is 12111233220263. The reversal of 12111233220221 is 12202233211121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111233220221 is a prime.

It is a super-2 number, since 2×12111233220221² (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 (12111233220211) 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, 19004885 + ... + 19631813.

It is an arithmetic number, because the mean of its divisors is an integer number (1516480977000).

Almost surely, 2^{12111233220221} is an apocalyptic number.

It is an amenable number.

12111233220221 is a deficient number, since it is larger than the sum of its proper divisors (20614595779).

12111233220221 is an equidigital number, since it uses as much as digits as its factorization.

12111233220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659779.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12111233220221 its reverse (12202233211121), we get a palindrome (24313466431342).

It can be divided in two parts, 1211123 and 3220221, that added together give a palindrome (4431344).

The spelling of 12111233220221 in words is "twelve trillion, one hundred eleven billion, two hundred thirty-three million, two hundred twenty thousand, two hundred twenty-one".