71121111899 has 2 divisors, whose sum is σ = 71121111900. Its totient is φ = 71121111898.

The previous prime is 71121111869. The next prime is 71121111907. The reversal of 71121111899 is 99811112117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71121111899 - 2¹⁶ = 71121046363 is a prime.

It is not a weakly prime, because it can be changed into another prime (71121111829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35560555949 + 35560555950.

It is an arithmetic number, because the mean of its divisors is an integer number (35560555950).

Almost surely, 2^71121111899 is an apocalyptic number.

71121111899 is a deficient number, since it is larger than the sum of its proper divisors (1).

71121111899 is an equidigital number, since it uses as much as digits as its factorization.

71121111899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 41.

The spelling of 71121111899 in words is "seventy-one billion, one hundred twenty-one million, one hundred eleven thousand, eight hundred ninety-nine".