210420420513 has 4 divisors (see below), whose sum is σ = 280560560688. Its totient is φ = 140280280340.

The previous prime is 210420420503. The next prime is 210420420517. The reversal of 210420420513 is 315024024012.

210420420513 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 210420420513 - 2³⁰ = 209346678689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210420420517) 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, 35070070083 + ... + 35070070088.

It is an arithmetic number, because the mean of its divisors is an integer number (70140140172).

Almost surely, 2^210420420513 is an apocalyptic number.

It is an amenable number.

210420420513 is a deficient number, since it is larger than the sum of its proper divisors (70140140175).

210420420513 is an equidigital number, since it uses as much as digits as its factorization.

210420420513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70140140174.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 210420420513 its reverse (315024024012), we get a palindrome (525444444525).

The spelling of 210420420513 in words is "two hundred ten billion, four hundred twenty million, four hundred twenty thousand, five hundred thirteen".