81076321141 has 2 divisors, whose sum is σ = 81076321142. Its totient is φ = 81076321140.

The previous prime is 81076321133. The next prime is 81076321223. The reversal of 81076321141 is 14112367018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44995318641 + 36081002500 = 212121^2 + 189950^2 .

It is a cyclic number.

It is not a de Polignac number, because 81076321141 - 2³ = 81076321133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81076321097 and 81076321106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81076322141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40538160570 + 40538160571.

It is an arithmetic number, because the mean of its divisors is an integer number (40538160571).

Almost surely, 2^81076321141 is an apocalyptic number.

It is an amenable number.

81076321141 is a deficient number, since it is larger than the sum of its proper divisors (1).

81076321141 is an equidigital number, since it uses as much as digits as its factorization.

81076321141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

Adding to 81076321141 its reverse (14112367018), we get a palindrome (95188688159).

The spelling of 81076321141 in words is "eighty-one billion, seventy-six million, three hundred twenty-one thousand, one hundred forty-one".