21002013303211 has 4 divisors (see below), whose sum is σ = 21094533185832. Its totient is φ = 20909493420592.

The previous prime is 21002013303203. The next prime is 21002013303221. The reversal of 21002013303211 is 11230331020012.

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 21002013303211 - 2³ = 21002013303203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002013303221) 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, 46259940970 + ... + 46259941423.

It is an arithmetic number, because the mean of its divisors is an integer number (5273633296458).

Almost surely, 2^{21002013303211} is an apocalyptic number.

21002013303211 is a deficient number, since it is larger than the sum of its proper divisors (92519882621).

21002013303211 is an equidigital number, since it uses as much as digits as its factorization.

21002013303211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92519882620.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21002013303211 its reverse (11230331020012), we get a palindrome (32232344323223).

The spelling of 21002013303211 in words is "twenty-one trillion, two billion, thirteen million, three hundred three thousand, two hundred eleven".