111961071 has 6 divisors (see below), whose sum is σ = 161721560. Its totient is φ = 74640708.

The previous prime is 111961063. The next prime is 111961093. The reversal of 111961071 is 170169111.

It is not a de Polignac number, because 111961071 - 2³ = 111961063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111961061) 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 in 5 ways as a sum of consecutive naturals, for example, 6220051 + ... + 6220068.

Almost surely, 2^111961071 is an apocalyptic number.

111961071 is a deficient number, since it is larger than the sum of its proper divisors (49760489).

111961071 is a wasteful number, since it uses less digits than its factorization.

111961071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12440125 (or 12440122 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 27.

The square root of 111961071 is about 10581.1658620400. The cubic root of 111961071 is about 481.9725984893.

The spelling of 111961071 in words is "one hundred eleven million, nine hundred sixty-one thousand, seventy-one".