21200031301 has 2 divisors, whose sum is σ = 21200031302. Its totient is φ = 21200031300.

The previous prime is 21200031289. The next prime is 21200031343. The reversal of 21200031301 is 10313000212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20664062500 + 535968801 = 143750^2 + 23151^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200031301 - 2⁷ = 21200031173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200071301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600015650 + 10600015651.

It is an arithmetic number, because the mean of its divisors is an integer number (10600015651).

Almost surely, 2^21200031301 is an apocalyptic number.

It is an amenable number.

21200031301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200031301 is an equidigital number, since it uses as much as digits as its factorization.

21200031301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21200031301 its reverse (10313000212), we get a palindrome (31513031513).

The spelling of 21200031301 in words is "twenty-one billion, two hundred million, thirty-one thousand, three hundred one".