111161203101 has 24 divisors (see below), whose sum is σ = 180435580416. Its totient is φ = 65432679840.

The previous prime is 111161203099. The next prime is 111161203121. The reversal of 111161203101 is 101302161111.

111161203101 is a `hidden beast` number, since 11 + 11 + 612 + 0 + 31 + 0 + 1 = 666.

It is not a de Polignac number, because 111161203101 - 2¹ = 111161203099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111161203121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20651565 + ... + 20656946.

It is an arithmetic number, because the mean of its divisors is an integer number (7518149184).

Almost surely, 2^111161203101 is an apocalyptic number.

It is an amenable number.

111161203101 is a deficient number, since it is larger than the sum of its proper divisors (69274377315).

111161203101 is a wasteful number, since it uses less digits than its factorization.

111161203101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41308553 (or 41308550 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 111161203101 its reverse (101302161111), we get a palindrome (212463364212).

The spelling of 111161203101 in words is "one hundred eleven billion, one hundred sixty-one million, two hundred three thousand, one hundred one".