111111000010101 has 96 divisors (see below), whose sum is σ = 203002621436160. Its totient is φ = 56986534444032.

The previous prime is 111111000010057. The next prime is 111111000010123. The reversal of 111111000010101 is 101010000111111.

It is not a de Polignac number, because 111111000010101 - 2⁹ = 111111000009589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111000010001) 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, 44947705 + ... + 47355233.

It is an arithmetic number, because the mean of its divisors is an integer number (2114610639960).

Almost surely, 2^{111111000010101} is an apocalyptic number.

It is an amenable number.

111111000010101 is a deficient number, since it is larger than the sum of its proper divisors (91891621426059).

111111000010101 is a wasteful number, since it uses less digits than its factorization.

111111000010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409115 (or 2409112 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111111000010101 its reverse (101010000111111), we get a palindrome (212121000121212).

The spelling of 111111000010101 in words is "one hundred eleven trillion, one hundred eleven billion, ten thousand, one hundred one".