12010011221 has 4 divisors (see below), whose sum is σ = 12933858252. Its totient is φ = 11086164192.

The previous prime is 12010011217. The next prime is 12010011229. The reversal of 12010011221 is 12211001021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6891324196 + 5118687025 = 83014^2 + 71545^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010011221 - 2² = 12010011217 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 (12010011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461923496 + ... + 461923521.

It is an arithmetic number, because the mean of its divisors is an integer number (3233464563).

Almost surely, 2^12010011221 is an apocalyptic number.

It is an amenable number.

12010011221 is a deficient number, since it is larger than the sum of its proper divisors (923847031).

12010011221 is an equidigital number, since it uses as much as digits as its factorization.

12010011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923847030.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12010011221 its reverse (12211001021), we get a palindrome (24221012242).

The spelling of 12010011221 in words is "twelve billion, ten million, eleven thousand, two hundred twenty-one".