210032301821 has 2 divisors, whose sum is σ = 210032301822. Its totient is φ = 210032301820.

The previous prime is 210032301803. The next prime is 210032301823. The reversal of 210032301821 is 128103230012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188360340025 + 21671961796 = 434005^2 + 147214^2 .

It is a cyclic number.

It is not a de Polignac number, because 210032301821 - 2²² = 210028107517 is a prime.

It is a super-2 number, since 2×210032301821² (a number of 23 digits) contains 22 as substring.

Together with 210032301823, 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 (210032301823) 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, 105016150910 + 105016150911.

It is an arithmetic number, because the mean of its divisors is an integer number (105016150911).

Almost surely, 2^210032301821 is an apocalyptic number.

It is an amenable number.

210032301821 is a deficient number, since it is larger than the sum of its proper divisors (1).

210032301821 is an equidigital number, since it uses as much as digits as its factorization.

210032301821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 210032301821 its reverse (128103230012), we get a palindrome (338135531833).

The spelling of 210032301821 in words is "two hundred ten billion, thirty-two million, three hundred one thousand, eight hundred twenty-one".