111055055000561 has 24 divisors (see below), whose sum is σ = 132021630074304. Its totient is φ = 93111850671840.

The previous prime is 111055055000521. The next prime is 111055055000569. The reversal of 111055055000561 is 165000550550111.

It is not a de Polignac number, because 111055055000561 - 2¹⁴ = 111055054984177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111055055000569) 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 23 ways as a sum of consecutive naturals, for example, 63736805 + ... + 65456018.

It is an arithmetic number, because the mean of its divisors is an integer number (5500901253096).

Almost surely, 2^{111055055000561} is an apocalyptic number.

It is an amenable number.

111055055000561 is a deficient number, since it is larger than the sum of its proper divisors (20966575073743).

111055055000561 is a wasteful number, since it uses less digits than its factorization.

111055055000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129193221 (or 129193214 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 111055055000561 in words is "one hundred eleven trillion, fifty-five billion, fifty-five million, five hundred sixty-one", and thus it is an aban number.