21312021301271 has 2 divisors, whose sum is σ = 21312021301272. Its totient is φ = 21312021301270.

The previous prime is 21312021301177. The next prime is 21312021301289. The reversal of 21312021301271 is 17210312021312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312021301271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21312021301271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21312026301271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656010650635 + 10656010650636.

It is an arithmetic number, because the mean of its divisors is an integer number (10656010650636).

Almost surely, 2^{21312021301271} is an apocalyptic number.

21312021301271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312021301271 is an equidigital number, since it uses as much as digits as its factorization.

21312021301271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 21312021301271 its reverse (17210312021312), we get a palindrome (38522333322583).

The spelling of 21312021301271 in words is "twenty-one trillion, three hundred twelve billion, twenty-one million, three hundred one thousand, two hundred seventy-one".