21010200021037 has 2 divisors, whose sum is σ = 21010200021038. Its totient is φ = 21010200021036.

The previous prime is 21010200021029. The next prime is 21010200021059. The reversal of 21010200021037 is 73012000201012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12987223080841 + 8022976940196 = 3603779^2 + 2832486^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010200021037 - 2³ = 21010200021029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010200021067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505100010518 + 10505100010519.

It is an arithmetic number, because the mean of its divisors is an integer number (10505100010519).

Almost surely, 2^{21010200021037} is an apocalyptic number.

It is an amenable number.

21010200021037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010200021037 is an equidigital number, since it uses as much as digits as its factorization.

21010200021037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 21010200021037 its reverse (73012000201012), we get a palindrome (94022200222049).

The spelling of 21010200021037 in words is "twenty-one trillion, ten billion, two hundred million, twenty-one thousand, thirty-seven".