12200012021 has 2 divisors, whose sum is σ = 12200012022. Its totient is φ = 12200012020.

The previous prime is 12200011997. The next prime is 12200012047. The reversal of 12200012021 is 12021000221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8109002500 + 4091009521 = 90050^2 + 63961^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200012021 - 2²⁶ = 12132903157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12200011993 and 12200012011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12200015021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100006010 + 6100006011.

It is an arithmetic number, because the mean of its divisors is an integer number (6100006011).

Almost surely, 2^12200012021 is an apocalyptic number.

It is an amenable number.

12200012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200012021 is an equidigital number, since it uses as much as digits as its factorization.

12200012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12200012021 its reverse (12021000221), we get a palindrome (24221012242).

The spelling of 12200012021 in words is "twelve billion, two hundred million, twelve thousand, twenty-one".