12002002221 has 12 divisors (see below), whose sum is σ = 17589711776. Its totient is φ = 7273940520.

The previous prime is 12002002219. The next prime is 12002002247. The reversal of 12002002221 is 12220020021.

It is not a de Polignac number, because 12002002221 - 2¹ = 12002002219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002002197 and 12002002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002002291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16531321 + ... + 16532046.

Almost surely, 2^12002002221 is an apocalyptic number.

12002002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12002002221 is a deficient number, since it is larger than the sum of its proper divisors (5587709555).

12002002221 is a wasteful number, since it uses less digits than its factorization.

12002002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33063392 (or 33063381 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12002002221 its reverse (12220020021), we get a palindrome (24222022242).

The spelling of 12002002221 in words is "twelve billion, two million, two thousand, two hundred twenty-one".