100111100561055 has 96 divisors (see below), whose sum is σ = 176390365132800. Its totient is φ = 52516982697984.

The previous prime is 100111100561047. The next prime is 100111100561057. The reversal of 100111100561055 is 550165001111001.

It is not a de Polignac number, because 100111100561055 - 2³ = 100111100561047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111100561057) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5314025326 + ... + 5314044164.

It is an arithmetic number, because the mean of its divisors is an integer number (1837399636800).

Almost surely, 2^{100111100561055} is an apocalyptic number.

100111100561055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100111100561055 is a deficient number, since it is larger than the sum of its proper divisors (76279264571745).

100111100561055 is a wasteful number, since it uses less digits than its factorization.

100111100561055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25125 (or 25122 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

Adding to 100111100561055 its reverse (550165001111001), we get a palindrome (650276101672056).

The spelling of 100111100561055 in words is "one hundred trillion, one hundred eleven billion, one hundred million, five hundred sixty-one thousand, fifty-five".