12012202221 has 8 divisors (see below), whose sum is σ = 16019630400. Its totient is φ = 8006454432.

The previous prime is 12012202151. The next prime is 12012202273. The reversal of 12012202221 is 12220221021.

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

It is not a de Polignac number, because 12012202221 - 2⁷ = 12012202093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12012202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012282221) 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, 403321 + ... + 432078.

It is an arithmetic number, because the mean of its divisors is an integer number (2002453800).

Almost surely, 2^12012202221 is an apocalyptic number.

It is an amenable number.

12012202221 is a deficient number, since it is larger than the sum of its proper divisors (4007428179).

12012202221 is an equidigital number, since it uses as much as digits as its factorization.

12012202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840195.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12012202221 its reverse (12220221021), we get a palindrome (24232423242).

The spelling of 12012202221 in words is "twelve billion, twelve million, two hundred two thousand, two hundred twenty-one".