111532212081 has 6 divisors (see below), whose sum is σ = 161102084130. Its totient is φ = 74354808048.

The previous prime is 111532212073. The next prime is 111532212091. The reversal of 111532212081 is 180212235111.

111532212081 is a `hidden beast` number, since 1 + 1 + 1 + 532 + 2 + 120 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 94224441600 + 17307770481 = 306960^2 + 131559^2 .

It is not a de Polignac number, because 111532212081 - 2³ = 111532212073 is a prime.

It is a super-2 number, since 2×111532212081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111532212031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6196233996 + ... + 6196234013.

It is an arithmetic number, because the mean of its divisors is an integer number (26850347355).

Almost surely, 2^111532212081 is an apocalyptic number.

It is an amenable number.

111532212081 is a deficient number, since it is larger than the sum of its proper divisors (49569872049).

111532212081 is a wasteful number, since it uses less digits than its factorization.

111532212081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392468015 (or 12392468012 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

Adding to 111532212081 its reverse (180212235111), we get a palindrome (291744447192).

The spelling of 111532212081 in words is "one hundred eleven billion, five hundred thirty-two million, two hundred twelve thousand, eighty-one".