211420220237 has 2 divisors, whose sum is σ = 211420220238. Its totient is φ = 211420220236.

The previous prime is 211420220213. The next prime is 211420220269. The reversal of 211420220237 is 732022024112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178067964361 + 33352255876 = 421981^2 + 182626^2 .

It is a cyclic number.

It is not a de Polignac number, because 211420220237 - 2²⁰ = 211419171661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211420228237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710110118 + 105710110119.

It is an arithmetic number, because the mean of its divisors is an integer number (105710110119).

Almost surely, 2^211420220237 is an apocalyptic number.

It is an amenable number.

211420220237 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420220237 is an equidigital number, since it uses as much as digits as its factorization.

211420220237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 211420220237 its reverse (732022024112), we get a palindrome (943442244349).

The spelling of 211420220237 in words is "two hundred eleven billion, four hundred twenty million, two hundred twenty thousand, two hundred thirty-seven".