21011331130223 has 80 divisors (see below), whose sum is σ = 26054759933280. Its totient is φ = 16884433133568.

The previous prime is 21011331130183. The next prime is 21011331130253. The reversal of 21011331130223 is 32203113311012.

It is not a de Polignac number, because 21011331130223 - 2²⁶ = 21011264021359 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 (21011331130253) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20741688665 + ... + 20741689677.

It is an arithmetic number, because the mean of its divisors is an integer number (325684499166).

Almost surely, 2^{21011331130223} is an apocalyptic number.

21011331130223 is a deficient number, since it is larger than the sum of its proper divisors (5043428803057).

21011331130223 is an equidigital number, since it uses as much as digits as its factorization.

21011331130223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21011331130223 its reverse (32203113311012), we get a palindrome (53214444441235).

The spelling of 21011331130223 in words is "twenty-one trillion, eleven billion, three hundred thirty-one million, one hundred thirty thousand, two hundred twenty-three".