21304211240311 has 8 divisors (see below), whose sum is σ = 21332916237600. Its totient is φ = 21275513488800.

The previous prime is 21304211240239. The next prime is 21304211240353. The reversal of 21304211240311 is 11304211240312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21304211240311 - 2³¹ = 21302063756663 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 (21304211240911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4085886 + ... + 7700836.

It is an arithmetic number, because the mean of its divisors is an integer number (2666614529700).

Almost surely, 2^{21304211240311} is an apocalyptic number.

21304211240311 is a deficient number, since it is larger than the sum of its proper divisors (28704997289).

21304211240311 is an equidigital number, since it uses as much as digits as its factorization.

21304211240311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622889.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21304211240311 its reverse (11304211240312), we get a palindrome (32608422480623).

Subtracting from 21304211240311 its reverse (11304211240312), we obtain a palindrome (9999999999999).

The spelling of 21304211240311 in words is "twenty-one trillion, three hundred four billion, two hundred eleven million, two hundred forty thousand, three hundred eleven".