111111110121101 has 4 divisors (see below), whose sum is σ = 111142595279100. Its totient is φ = 111079624963104.

The previous prime is 111111110121091. The next prime is 111111110121199. The reversal of 111111110121101 is 101121011111111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45134560587076 + 65976549534025 = 6718226^2 + 8122595^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111110121101 - 2²² = 111111105926797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111110121601) 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, 15742573706 + ... + 15742580763.

It is an arithmetic number, because the mean of its divisors is an integer number (27785648819775).

Almost surely, 2^{111111110121101} is an apocalyptic number.

It is an amenable number.

111111110121101 is a deficient number, since it is larger than the sum of its proper divisors (31485157999).

111111110121101 is an equidigital number, since it uses as much as digits as its factorization.

111111110121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31485157998.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 111111110121101 its reverse (101121011111111), we get a palindrome (212232121232212).

The spelling of 111111110121101 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, one hundred twenty-one thousand, one hundred one".