12110012221 has 4 divisors (see below), whose sum is σ = 12113230752. Its totient is φ = 12106793692.

The previous prime is 12110012209. The next prime is 12110012359. The reversal of 12110012221 is 12221001121.

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 not a de Polignac number, because 12110012221 - 2¹¹ = 12110010173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110012021) 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, 1603615 + ... + 1611148.

It is an arithmetic number, because the mean of its divisors is an integer number (3028307688).

Almost surely, 2^12110012221 is an apocalyptic number.

It is an amenable number.

12110012221 is a deficient number, since it is larger than the sum of its proper divisors (3218531).

12110012221 is an equidigital number, since it uses as much as digits as its factorization.

12110012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218530.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12110012221 its reverse (12221001121), we get a palindrome (24331013342).

The spelling of 12110012221 in words is "twelve billion, one hundred ten million, twelve thousand, two hundred twenty-one".