21210322200037 has 2 divisors, whose sum is σ = 21210322200038. Its totient is φ = 21210322200036.

The previous prime is 21210322200017. The next prime is 21210322200083. The reversal of 21210322200037 is 73000222301212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21204192249601 + 6129950436 = 4604801^2 + 78294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210322200037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21210322199984 and 21210322200020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210322200017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605161100018 + 10605161100019.

It is an arithmetic number, because the mean of its divisors is an integer number (10605161100019).

Almost surely, 2^{21210322200037} is an apocalyptic number.

It is an amenable number.

21210322200037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210322200037 is an equidigital number, since it uses as much as digits as its factorization.

21210322200037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 21210322200037 its reverse (73000222301212), we get a palindrome (94210544501249).

The spelling of 21210322200037 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-two million, two hundred thousand, thirty-seven".