21321114365 has 8 divisors (see below), whose sum is σ = 26004769368. Its totient is φ = 16777270080.

The previous prime is 21321114343. The next prime is 21321114401. The reversal of 21321114365 is 56341112312.

It can be written as a sum of positive squares in 4 ways, for example, as 1026169 + 21320088196 = 1013^2 + 146014^2 .

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

It is not a de Polignac number, because 21321114365 - 2⁶ = 21321114301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34952342 + ... + 34952951.

It is an arithmetic number, because the mean of its divisors is an integer number (3250596171).

Almost surely, 2^21321114365 is an apocalyptic number.

It is an amenable number.

21321114365 is a deficient number, since it is larger than the sum of its proper divisors (4683655003).

21321114365 is an equidigital number, since it uses as much as digits as its factorization.

21321114365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69905359.

The product of its digits is 4320, while the sum is 29.

Adding to 21321114365 its reverse (56341112312), we get a palindrome (77662226677).

The spelling of 21321114365 in words is "twenty-one billion, three hundred twenty-one million, one hundred fourteen thousand, three hundred sixty-five".