12020002221 has 4 divisors (see below), whose sum is σ = 16026669632. Its totient is φ = 8013334812.

The previous prime is 12020002207. The next prime is 12020002229. The reversal of 12020002221 is 12220002021.

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 not a de Polignac number, because 12020002221 - 2⁹ = 12020001709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020002197 and 12020002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020002229) 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, 2003333701 + ... + 2003333706.

It is an arithmetic number, because the mean of its divisors is an integer number (4006667408).

Almost surely, 2^12020002221 is an apocalyptic number.

It is an amenable number.

12020002221 is a deficient number, since it is larger than the sum of its proper divisors (4006667411).

12020002221 is an equidigital number, since it uses as much as digits as its factorization.

12020002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006667410.

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

Adding to 12020002221 its reverse (12220002021), we get a palindrome (24240004242).

The spelling of 12020002221 in words is "twelve billion, twenty million, two thousand, two hundred twenty-one".