111111112101 has 32 divisors (see below), whose sum is σ = 164460723840. Its totient is φ = 66157459200.

The previous prime is 111111112097. The next prime is 111111112139. The reversal of 111111112101 is 101211111111.

It is not a de Polignac number, because 111111112101 - 2² = 111111112097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111112901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1684735 + ... + 1749443.

It is an arithmetic number, because the mean of its divisors is an integer number (5139397620).

Almost surely, 2^111111112101 is an apocalyptic number.

111111112101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111111112101 is a deficient number, since it is larger than the sum of its proper divisors (53349611739).

111111112101 is a wasteful number, since it uses less digits than its factorization.

111111112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65637.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111111112101 its reverse (101211111111), we get a palindrome (212322223212).

The spelling of 111111112101 in words is "one hundred eleven billion, one hundred eleven million, one hundred twelve thousand, one hundred one".