12110211221 has 8 divisors (see below), whose sum is σ = 12249532800. Its totient is φ = 11970962080.

The previous prime is 12110211173. The next prime is 12110211257. The reversal of 12110211221 is 12211201121.

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-12110211221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12110211196 and 12110211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110211121) 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, 364190 + ... + 396048.

It is an arithmetic number, because the mean of its divisors is an integer number (1531191600).

Almost surely, 2^12110211221 is an apocalyptic number.

It is an amenable number.

12110211221 is a deficient number, since it is larger than the sum of its proper divisors (139321579).

12110211221 is an equidigital number, since it uses as much as digits as its factorization.

12110211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36219.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12110211221 its reverse (12211201121), we get a palindrome (24321412342).

The spelling of 12110211221 in words is "twelve billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-one".