71111112 has 16 divisors (see below), whose sum is σ = 177777840. Its totient is φ = 23703696.

The previous prime is 71111111. The next prime is 71111113. The reversal of 71111112 is 21111117.

It is an interprime number because it is at equal distance from previous prime (71111111) and next prime (71111113).

It is a junction number, because it is equal to n+sod(n) for n = 71111091 and 71111100.

It is not an unprimeable number, because it can be changed into a prime (71111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481458 + ... + 1481505.

It is an arithmetic number, because the mean of its divisors is an integer number (11111115).

Almost surely, 2^71111112 is an apocalyptic number.

It is an amenable number.

71111112 is an abundant number, since it is smaller than the sum of its proper divisors (106666728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71111112 is a wasteful number, since it uses less digits than its factorization.

71111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962972 (or 2962968 counting only the distinct ones).

The product of its digits is 14, while the sum is 15.

The square root of 71111112 is about 8432.7404798203. The cubic root of 71111112 is about 414.2976691868.

Adding to 71111112 its reverse (21111117), we get a palindrome (92222229).

The spelling of 71111112 in words is "seventy-one million, one hundred eleven thousand, one hundred twelve".