111105562161 has 16 divisors (see below), whose sum is σ = 161653517568. Its totient is φ = 67317776400.

The previous prime is 111105562093. The next prime is 111105562177. The reversal of 111105562161 is 161265501111.

It is not a de Polignac number, because 111105562161 - 2⁹ = 111105561649 is a prime.

It is a super-2 number, since 2×111105562161² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111105560161) 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 in 15 ways as a sum of consecutive naturals, for example, 353571 + ... + 589256.

It is an arithmetic number, because the mean of its divisors is an integer number (10103344848).

Almost surely, 2^111105562161 is an apocalyptic number.

111105562161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111105562161 is a deficient number, since it is larger than the sum of its proper divisors (50547955407).

111105562161 is a wasteful number, since it uses less digits than its factorization.

111105562161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946412.

The product of its (nonzero) digits is 1800, while the sum is 30.

The spelling of 111105562161 in words is "one hundred eleven billion, one hundred five million, five hundred sixty-two thousand, one hundred sixty-one".