12200002021 has 4 divisors (see below), whose sum is σ = 12200309100. Its totient is φ = 12199694944.

The previous prime is 12200001991. The next prime is 12200002037. The reversal of 12200002021 is 12020000221.

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 7036860996 + 5163141025 = 83886^2 + 71855^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200002021 - 2⁷ = 12200001893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200001989 and 12200002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200002421) 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, 83206 + ... + 176983.

It is an arithmetic number, because the mean of its divisors is an integer number (3050077275).

Almost surely, 2^12200002021 is an apocalyptic number.

It is an amenable number.

12200002021 is a deficient number, since it is larger than the sum of its proper divisors (307079).

12200002021 is an equidigital number, since it uses as much as digits as its factorization.

12200002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307078.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12200002021 its reverse (12020000221), we get a palindrome (24220002242).

The spelling of 12200002021 in words is "twelve billion, two hundred million, two thousand, twenty-one".