210020021013 has 24 divisors (see below), whose sum is σ = 311256388800. Its totient is φ = 125854674880.

The previous prime is 210020021009. The next prime is 210020021027. The reversal of 210020021013 is 310120020012.

It is not a de Polignac number, because 210020021013 - 2² = 210020021009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210020021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020021033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3218073 + ... + 3282686.

It is an arithmetic number, because the mean of its divisors is an integer number (12969016200).

Almost surely, 2^210020021013 is an apocalyptic number.

It is an amenable number.

210020021013 is a deficient number, since it is larger than the sum of its proper divisors (101236367787).

210020021013 is a wasteful number, since it uses less digits than its factorization.

210020021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6500873 (or 6500862 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 210020021013 its reverse (310120020012), we get a palindrome (520140041025).

The spelling of 210020021013 in words is "two hundred ten billion, twenty million, twenty-one thousand, thirteen".