12002212221 has 4 divisors (see below), whose sum is σ = 16002949632. Its totient is φ = 8001474812.

The previous prime is 12002212169. The next prime is 12002212231. The reversal of 12002212221 is 12221220021.

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 12002212221 - 2¹³ = 12002204029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12002212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002212231) 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, 2000368701 + ... + 2000368706.

It is an arithmetic number, because the mean of its divisors is an integer number (4000737408).

Almost surely, 2^12002212221 is an apocalyptic number.

It is an amenable number.

12002212221 is a deficient number, since it is larger than the sum of its proper divisors (4000737411).

12002212221 is an equidigital number, since it uses as much as digits as its factorization.

12002212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000737410.

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

Adding to 12002212221 its reverse (12221220021), we get a palindrome (24223432242).

The spelling of 12002212221 in words is "twelve billion, two million, two hundred twelve thousand, two hundred twenty-one".