21302113321 has 16 divisors (see below), whose sum is σ = 22494844800. Its totient is φ = 20116660608.

The previous prime is 21302113309. The next prime is 21302113331. The reversal of 21302113321 is 12331120312.

It is a cyclic number.

It is not a de Polignac number, because 21302113321 - 2⁵ = 21302113289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (21302113331) 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, 13804876 + ... + 13806418.

It is an arithmetic number, because the mean of its divisors is an integer number (1405927800).

Almost surely, 2^21302113321 is an apocalyptic number.

It is an amenable number.

21302113321 is a deficient number, since it is larger than the sum of its proper divisors (1192731479).

21302113321 is a wasteful number, since it uses less digits than its factorization.

21302113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3408.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21302113321 its reverse (12331120312), we get a palindrome (33633233633).

The spelling of 21302113321 in words is "twenty-one billion, three hundred two million, one hundred thirteen thousand, three hundred twenty-one".