111001111002101 has 4 divisors (see below), whose sum is σ = 111001209844992. Its totient is φ = 111001012159212.

The previous prime is 111001111002083. The next prime is 111001111002109. The reversal of 111001111002101 is 101200111100111.

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 111001111002101 - 2²² = 111001106807797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001111002109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47717351 + ... + 49989476.

It is an arithmetic number, because the mean of its divisors is an integer number (27750302461248).

Almost surely, 2^{111001111002101} is an apocalyptic number.

It is an amenable number.

111001111002101 is a deficient number, since it is larger than the sum of its proper divisors (98842891).

111001111002101 is an equidigital number, since it uses as much as digits as its factorization.

111001111002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98842890.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111001111002101 its reverse (101200111100111), we get a palindrome (212201222102212).

The spelling of 111001111002101 in words is "one hundred eleven trillion, one billion, one hundred eleven million, two thousand, one hundred one".