81068100331 has 2 divisors, whose sum is σ = 81068100332. Its totient is φ = 81068100330.

The previous prime is 81068100329. The next prime is 81068100389. The reversal of 81068100331 is 13300186018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81068100331 - 2¹ = 81068100329 is a prime.

It is a super-2 number, since 2×81068100331² (a number of 23 digits) contains 22 as substring.

Together with 81068100329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 81068100293 and 81068100302.

It is not a weakly prime, because it can be changed into another prime (81068100301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40534050165 + 40534050166.

It is an arithmetic number, because the mean of its divisors is an integer number (40534050166).

Almost surely, 2^81068100331 is an apocalyptic number.

81068100331 is a deficient number, since it is larger than the sum of its proper divisors (1).

81068100331 is an equidigital number, since it uses as much as digits as its factorization.

81068100331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 81068100331 its reverse (13300186018), we get a palindrome (94368286349).

The spelling of 81068100331 in words is "eighty-one billion, sixty-eight million, one hundred thousand, three hundred thirty-one".