21242312110031 has 2 divisors, whose sum is σ = 21242312110032. Its totient is φ = 21242312110030.

The previous prime is 21242312110013. The next prime is 21242312110081. The reversal of 21242312110031 is 13001121324212.

Together with previous prime (21242312110013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21242312110031 is a prime.

It is a super-3 number, since 3×21242312110031³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21242312109979 and 21242312110006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21242312110081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621156055015 + 10621156055016.

It is an arithmetic number, because the mean of its divisors is an integer number (10621156055016).

Almost surely, 2^{21242312110031} is an apocalyptic number.

21242312110031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21242312110031 is an equidigital number, since it uses as much as digits as its factorization.

21242312110031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21242312110031 its reverse (13001121324212), we get a palindrome (34243433434243).

The spelling of 21242312110031 in words is "twenty-one trillion, two hundred forty-two billion, three hundred twelve million, one hundred ten thousand, thirty-one".