111101111111101 has 4 divisors (see below), whose sum is σ = 115931594202912. Its totient is φ = 106270628019292.

The previous prime is 111101111110981. The next prime is 111101111111119. The reversal of 111101111111101 is 101111111101111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111101111111101 - 2¹³ = 111101111102909 is a prime.

It is a super-3 number, since 3×111101111111101³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101111151101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2415241545871 + ... + 2415241545916.

It is an arithmetic number, because the mean of its divisors is an integer number (28982898550728).

Almost surely, 2^{111101111111101} is an apocalyptic number.

It is an amenable number.

111101111111101 is a deficient number, since it is larger than the sum of its proper divisors (4830483091811).

111101111111101 is an equidigital number, since it uses as much as digits as its factorization.

111101111111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830483091810.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 111101111111101 its reverse (101111111101111), we get a palindrome (212212222212212).

It can be divided in two parts, 111 and 101111111101, that multiplied together give a palindrome (11223333332211).

The spelling of 111101111111101 in words is "one hundred eleven trillion, one hundred one billion, one hundred eleven million, one hundred eleven thousand, one hundred one".