21102010202237 has 2 divisors, whose sum is σ = 21102010202238. Its totient is φ = 21102010202236.

The previous prime is 21102010202171. The next prime is 21102010202239. The reversal of 21102010202237 is 73220201020112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19084831967161 + 2017178235076 = 4368619^2 + 1420274^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102010202237 - 2¹⁴ = 21102010185853 is a prime.

Together with 21102010202239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102010202239) 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, 10551005101118 + 10551005101119.

It is an arithmetic number, because the mean of its divisors is an integer number (10551005101119).

Almost surely, 2^{21102010202237} is an apocalyptic number.

It is an amenable number.

21102010202237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102010202237 is an equidigital number, since it uses as much as digits as its factorization.

21102010202237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21102010202237 its reverse (73220201020112), we get a palindrome (94322211222349).

The spelling of 21102010202237 in words is "twenty-one trillion, one hundred two billion, ten million, two hundred two thousand, two hundred thirty-seven".