12200212120021 has 2 divisors, whose sum is σ = 12200212120022. Its totient is φ = 12200212120020.

The previous prime is 12200212120013. The next prime is 12200212120027. The reversal of 12200212120021 is 12002121200221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7460469480996 + 4739742639025 = 2731386^2 + 2177095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200212120021 - 2³ = 12200212120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12200212119977 and 12200212120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12200212120027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100106060010 + 6100106060011.

It is an arithmetic number, because the mean of its divisors is an integer number (6100106060011).

Almost surely, 2^{12200212120021} is an apocalyptic number.

It is an amenable number.

12200212120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200212120021 is an equidigital number, since it uses as much as digits as its factorization.

12200212120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12200212120021 its reverse (12002121200221), we get a palindrome (24202333320242).

It can be divided in two parts, 1 and 2200212120021, that added together give a palindrome (2200212120022).

The spelling of 12200212120021 in words is "twelve trillion, two hundred billion, two hundred twelve million, one hundred twenty thousand, twenty-one".