21013110211303 has 4 divisors (see below), whose sum is σ = 24014983098640. Its totient is φ = 18011237323968.

The previous prime is 21013110211277. The next prime is 21013110211397. The reversal of 21013110211303 is 30311201131012.

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

It is not a de Polignac number, because 21013110211303 - 2¹⁷ = 21013110080231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013110271303) 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, 1500936443658 + ... + 1500936443671.

It is an arithmetic number, because the mean of its divisors is an integer number (6003745774660).

Almost surely, 2^{21013110211303} is an apocalyptic number.

21013110211303 is a deficient number, since it is larger than the sum of its proper divisors (3001872887337).

21013110211303 is an equidigital number, since it uses as much as digits as its factorization.

21013110211303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001872887336.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21013110211303 its reverse (30311201131012), we get a palindrome (51324311342315).

The spelling of 21013110211303 in words is "twenty-one trillion, thirteen billion, one hundred ten million, two hundred eleven thousand, three hundred three".