71231113801 has 2 divisors, whose sum is σ = 71231113802. Its totient is φ = 71231113800.

The previous prime is 71231113739. The next prime is 71231113817. The reversal of 71231113801 is 10831113217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68977143225 + 2253970576 = 262635^2 + 47476^2 .

It is a cyclic number.

It is not a de Polignac number, because 71231113801 - 2⁷ = 71231113673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71231113801.

It is not a weakly prime, because it can be changed into another prime (71231113861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35615556900 + 35615556901.

It is an arithmetic number, because the mean of its divisors is an integer number (35615556901).

Almost surely, 2^71231113801 is an apocalyptic number.

It is an amenable number.

71231113801 is a deficient number, since it is larger than the sum of its proper divisors (1).

71231113801 is an equidigital number, since it uses as much as digits as its factorization.

71231113801 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 28.

The spelling of 71231113801 in words is "seventy-one billion, two hundred thirty-one million, one hundred thirteen thousand, eight hundred one".