10211720403 has 4 divisors (see below), whose sum is σ = 13615627208. Its totient is φ = 6807813600.

The previous prime is 10211720401. The next prime is 10211720419. The reversal of 10211720403 is 30402711201.

10211720403 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.

It is not a de Polignac number, because 10211720403 - 2¹ = 10211720401 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 10211720403.

It is not an unprimeable number, because it can be changed into a prime (10211720401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701953398 + ... + 1701953403.

It is an arithmetic number, because the mean of its divisors is an integer number (3403906802).

Almost surely, 2^10211720403 is an apocalyptic number.

10211720403 is a deficient number, since it is larger than the sum of its proper divisors (3403906805).

10211720403 is an equidigital number, since it uses as much as digits as its factorization.

10211720403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403906804.

The product of its (nonzero) digits is 336, while the sum is 21.

The spelling of 10211720403 in words is "ten billion, two hundred eleven million, seven hundred twenty thousand, four hundred three".