71111111023 has 2 divisors, whose sum is σ = 71111111024. Its totient is φ = 71111111022.

The previous prime is 71111111009. The next prime is 71111111039. The reversal of 71111111023 is 32011111117.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71111111023 - 2⁵ = 71111110991 is a prime.

It is a super-2 number, since 2×71111111023² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71111171023) 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, 35555555511 + 35555555512.

It is an arithmetic number, because the mean of its divisors is an integer number (35555555512).

Almost surely, 2^71111111023 is an apocalyptic number.

71111111023 is a deficient number, since it is larger than the sum of its proper divisors (1).

71111111023 is an equidigital number, since it uses as much as digits as its factorization.

71111111023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 19.

The spelling of 71111111023 in words is "seventy-one billion, one hundred eleven million, one hundred eleven thousand, twenty-three".