21312300322231 has 2 divisors, whose sum is σ = 21312300322232. Its totient is φ = 21312300322230.

The previous prime is 21312300322193. The next prime is 21312300322267. The reversal of 21312300322231 is 13222300321312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21312300322231 - 2¹¹ = 21312300320183 is a prime.

It is a super-2 number, since 2×21312300322231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312300322196 and 21312300322205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21312300322931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656150161115 + 10656150161116.

It is an arithmetic number, because the mean of its divisors is an integer number (10656150161116).

Almost surely, 2^{21312300322231} is an apocalyptic number.

21312300322231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312300322231 is an equidigital number, since it uses as much as digits as its factorization.

21312300322231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21312300322231 its reverse (13222300321312), we get a palindrome (34534600643543).

The spelling of 21312300322231 in words is "twenty-one trillion, three hundred twelve billion, three hundred million, three hundred twenty-two thousand, two hundred thirty-one".