111111000001 has 4 divisors (see below), whose sum is σ = 112449686832. Its totient is φ = 109772313172.

The previous prime is 111110999999. The next prime is 111111000041. The reversal of 111111000001 is 100000111111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100000111111 = 44699 ⋅2237189.

It is a cyclic number.

It is not a de Polignac number, because 111111000001 - 2¹ = 111110999999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111111000041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669343291 + ... + 669343456.

It is an arithmetic number, because the mean of its divisors is an integer number (28112421708).

Almost surely, 2^111111000001 is an apocalyptic number.

It is an amenable number.

111111000001 is a deficient number, since it is larger than the sum of its proper divisors (1338686831).

111111000001 is an equidigital number, since it uses as much as digits as its factorization.

111111000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338686830.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 111111000001 its reverse (100000111111), we get a palindrome (211111111112).

It can be divided in two parts, 11111 and 1000001, that multiplied together give a palindrome (11111011111).

The spelling of 111111000001 in words is "one hundred eleven billion, one hundred eleven million, one", and thus it is an aban number.