12200222021 has 4 divisors (see below), whose sum is σ = 13138700652. Its totient is φ = 11261743392.

The previous prime is 12200222009. The next prime is 12200222039. The reversal of 12200222021 is 12022200221.

12200222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3015108100 + 9185113921 = 54910^2 + 95839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12200222021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200221987 and 12200222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200222521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469239296 + ... + 469239321.

It is an arithmetic number, because the mean of its divisors is an integer number (3284675163).

Almost surely, 2^12200222021 is an apocalyptic number.

It is an amenable number.

12200222021 is a deficient number, since it is larger than the sum of its proper divisors (938478631).

12200222021 is an equidigital number, since it uses as much as digits as its factorization.

12200222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938478630.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12200222021 its reverse (12022200221), we get a palindrome (24222422242).

The spelling of 12200222021 in words is "twelve billion, two hundred million, two hundred twenty-two thousand, twenty-one".