21313321321301 has 4 divisors (see below), whose sum is σ = 21315614811852. Its totient is φ = 21311027830752.

The previous prime is 21313321321291. The next prime is 21313321321427. The reversal of 21313321321301 is 10312312331312.

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 1136784572401 + 20176536748900 = 1066201^2 + 4491830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313321321301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313321321001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146731336 + ... + 1146749921.

It is an arithmetic number, because the mean of its divisors is an integer number (5328903702963).

Almost surely, 2^{21313321321301} is an apocalyptic number.

It is an amenable number.

21313321321301 is a deficient number, since it is larger than the sum of its proper divisors (2293490551).

21313321321301 is an equidigital number, since it uses as much as digits as its factorization.

21313321321301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293490550.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21313321321301 its reverse (10312312331312), we get a palindrome (31625633652613).

The spelling of 21313321321301 in words is "twenty-one trillion, three hundred thirteen billion, three hundred twenty-one million, three hundred twenty-one thousand, three hundred one".