21313220311330 has 16 divisors (see below), whose sum is σ = 39255977876544. Its totient is φ = 8327025609840.

The previous prime is 21313220311247. The next prime is 21313220311333. The reversal of 21313220311330 is 3311302231312.

It is a junction number, because it is equal to n+sod(n) for n = 21313220311295 and 21313220311304.

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 7 ways as a sum of consecutive naturals, for example, 24782813886 + ... + 24782814745.

It is an arithmetic number, because the mean of its divisors is an integer number (2453498617284).

Almost surely, 2^{21313220311330} is an apocalyptic number.

21313220311330 is a deficient number, since it is larger than the sum of its proper divisors (17942757565214).

21313220311330 is a wasteful number, since it uses less digits than its factorization.

21313220311330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49565628681.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21313220311330 its reverse (3311302231312), we get a palindrome (24624522542642).

The spelling of 21313220311330 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, three hundred thirty".