1011111100101 has 16 divisors (see below), whose sum is σ = 1515989872320. Its totient is φ = 665952690960.

The previous prime is 1011111100093. The next prime is 1011111100121. The reversal of 1011111100101 is 1010011111101.

It is not a de Polignac number, because 1011111100101 - 2³ = 1011111100093 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 (1011111100121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225591490 + ... + 225595971.

It is an arithmetic number, because the mean of its divisors is an integer number (94749367020).

Almost surely, 2^{1011111100101} is an apocalyptic number.

It is an amenable number.

1011111100101 is a deficient number, since it is larger than the sum of its proper divisors (504878772219).

1011111100101 is an equidigital number, since it uses as much as digits as its factorization.

1011111100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451187553 (or 451187547 counting only the distinct ones).

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

Adding to 1011111100101 its reverse (1010011111101), we get a palindrome (2021122211202).

The spelling of 1011111100101 in words is "one trillion, eleven billion, one hundred eleven million, one hundred thousand, one hundred one".