21002131303303 has 4 divisors (see below), whose sum is σ = 21005836041960. Its totient is φ = 20998426564648.

The previous prime is 21002131303271. The next prime is 21002131303369. The reversal of 21002131303303 is 30330313120012.

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

It is a cyclic number.

It is not a de Polignac number, because 21002131303303 - 2⁵ = 21002131303271 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 (21002131307303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1852360825 + ... + 1852372162.

It is an arithmetic number, because the mean of its divisors is an integer number (5251459010490).

Almost surely, 2^{21002131303303} is an apocalyptic number.

21002131303303 is a deficient number, since it is larger than the sum of its proper divisors (3704738657).

21002131303303 is an equidigital number, since it uses as much as digits as its factorization.

21002131303303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704738656.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21002131303303 its reverse (30330313120012), we get a palindrome (51332444423315).

The spelling of 21002131303303 in words is "twenty-one trillion, two billion, one hundred thirty-one million, three hundred three thousand, three hundred three".