21313013330231 has 6 divisors (see below), whose sum is σ = 24792688976040. Its totient is φ = 18268297140156.

The previous prime is 21313013330153. The next prime is 21313013330269. The reversal of 21313013330231 is 13203331031312.

It is not a de Polignac number, because 21313013330231 - 2¹⁰ = 21313013329207 is a prime.

It is a super-2 number, since 2×21313013330231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21313013330231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313013330131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217479727811 + ... + 217479727908.

It is an arithmetic number, because the mean of its divisors is an integer number (4132114829340).

Almost surely, 2^{21313013330231} is an apocalyptic number.

21313013330231 is a deficient number, since it is larger than the sum of its proper divisors (3479675645809).

21313013330231 is an equidigital number, since it uses as much as digits as its factorization.

21313013330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434959455733 (or 434959455726 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21313013330231 its reverse (13203331031312), we get a palindrome (34516344361543).

The spelling of 21313013330231 in words is "twenty-one trillion, three hundred thirteen billion, thirteen million, three hundred thirty thousand, two hundred thirty-one".