210052623821 has 4 divisors (see below), whose sum is σ = 216828514944. Its totient is φ = 203276732700.

The previous prime is 210052623773. The next prime is 210052623839. The reversal of 210052623821 is 128326250012.

210052623821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210052623821 - 2¹⁸ = 210052361677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210052620821) 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 in 3 ways as a sum of consecutive naturals, for example, 3387945515 + ... + 3387945576.

It is an arithmetic number, because the mean of its divisors is an integer number (54207128736).

Almost surely, 2^210052623821 is an apocalyptic number.

It is an amenable number.

210052623821 is a deficient number, since it is larger than the sum of its proper divisors (6775891123).

210052623821 is an equidigital number, since it uses as much as digits as its factorization.

210052623821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775891122.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 210052623821 its reverse (128326250012), we get a palindrome (338378873833).

The spelling of 210052623821 in words is "two hundred ten billion, fifty-two million, six hundred twenty-three thousand, eight hundred twenty-one".