21313220311304 has 32 divisors (see below), whose sum is σ = 40355153661600. Its totient is φ = 10551941736960.

The previous prime is 21313220311247. The next prime is 21313220311333. The reversal of 21313220311304 is 40311302231312.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4201034 + ... + 7763705.

It is an arithmetic number, because the mean of its divisors is an integer number (1261098551925).

Almost surely, 2^{21313220311304} is an apocalyptic number.

It is an amenable number.

21313220311304 is a deficient number, since it is larger than the sum of its proper divisors (19041933350296).

21313220311304 is a wasteful number, since it uses less digits than its factorization.

21313220311304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11966933 (or 11966929 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21313220311304 its reverse (40311302231312), we get a palindrome (61624522542616).

The spelling of 21313220311304 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, three hundred four".