21010032313321 has 4 divisors (see below), whose sum is σ = 21013738445700. Its totient is φ = 21006326180944.

The previous prime is 21010032313241. The next prime is 21010032313337. The reversal of 21010032313321 is 12331323001012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11945567287696 + 9064465025625 = 3456236^2 + 3010725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010032313321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010032313292 and 21010032313301.

It is not an unprimeable number, because it can be changed into a prime (21010032313021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1853057686 + ... + 1853069023.

It is an arithmetic number, because the mean of its divisors is an integer number (5253434611425).

Almost surely, 2^{21010032313321} is an apocalyptic number.

It is an amenable number.

21010032313321 is a deficient number, since it is larger than the sum of its proper divisors (3706132379).

21010032313321 is an equidigital number, since it uses as much as digits as its factorization.

21010032313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3706132378.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21010032313321 its reverse (12331323001012), we get a palindrome (33341355314333).

The spelling of 21010032313321 in words is "twenty-one trillion, ten billion, thirty-two million, three hundred thirteen thousand, three hundred twenty-one".