210401042403 has 4 divisors (see below), whose sum is σ = 280534723208. Its totient is φ = 140267361600.

The previous prime is 210401042389. The next prime is 210401042447. The reversal of 210401042403 is 304240104012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 210401042403 - 2⁹ = 210401041891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210401042403.

It is not an unprimeable number, because it can be changed into a prime (210401042603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35066840398 + ... + 35066840403.

It is an arithmetic number, because the mean of its divisors is an integer number (70133680802).

Almost surely, 2^210401042403 is an apocalyptic number.

210401042403 is a deficient number, since it is larger than the sum of its proper divisors (70133680805).

210401042403 is an equidigital number, since it uses as much as digits as its factorization.

210401042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70133680804.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 210401042403 its reverse (304240104012), we get a palindrome (514641146415).

The spelling of 210401042403 in words is "two hundred ten billion, four hundred one million, forty-two thousand, four hundred three".