21021333130223 has 4 divisors (see below), whose sum is σ = 21023456292648. Its totient is φ = 21019209967800.

The previous prime is 21021333130181. The next prime is 21021333130229. The reversal of 21021333130223 is 32203133312012.

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 21021333130223 - 2¹² = 21021333126127 is a prime.

It is a super-2 number, since 2×21021333130223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021333130192 and 21021333130201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021333130229) 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, 1061566361 + ... + 1061586162.

It is an arithmetic number, because the mean of its divisors is an integer number (5255864073162).

Almost surely, 2^{21021333130223} is an apocalyptic number.

21021333130223 is a deficient number, since it is larger than the sum of its proper divisors (2123162425).

21021333130223 is an equidigital number, since it uses as much as digits as its factorization.

21021333130223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123162424.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21021333130223 its reverse (32203133312012), we get a palindrome (53224466442235).

The spelling of 21021333130223 in words is "twenty-one trillion, twenty-one billion, three hundred thirty-three million, one hundred thirty thousand, two hundred twenty-three".