21313220311334 has 32 divisors (see below), whose sum is σ = 37159924089600. Its totient is φ = 8978524403040.

The previous prime is 21313220311333. The next prime is 21313220311343. The reversal of 21313220311334 is 43311302231312.

It is a junction number, because it is equal to n+sod(n) for n = 21313220311297 and 21313220311306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313220311333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7035689 + ... + 9598299.

It is an arithmetic number, because the mean of its divisors is an integer number (1161247627800).

Almost surely, 2^{21313220311334} is an apocalyptic number.

21313220311334 is a deficient number, since it is larger than the sum of its proper divisors (15846703778266).

21313220311334 is a wasteful number, since it uses less digits than its factorization.

21313220311334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572748.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21313220311334 its reverse (43311302231312), we get a palindrome (64624522542646).

The spelling of 21313220311334 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, three hundred thirty-four".