1111111000001 has 4 divisors (see below), whose sum is σ = 1111238123604. Its totient is φ = 1110983876400.

The previous prime is 1111110999997. The next prime is 1111111000009. The reversal of 1111111000001 is 1000001111111.

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 173825621776 + 937285378225 = 416924^2 + 968135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111111000001 - 2² = 1111110999997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111111000009) 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, 63548690 + ... + 63566171.

It is an arithmetic number, because the mean of its divisors is an integer number (277809530901).

Almost surely, 2^{1111111000001} is an apocalyptic number.

It is an amenable number.

1111111000001 is a deficient number, since it is larger than the sum of its proper divisors (127123603).

1111111000001 is an equidigital number, since it uses as much as digits as its factorization.

1111111000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127123602.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 1111111000001 its reverse (1000001111111), we get a palindrome (2111112111112).

It can be divided in two parts, 111111 and 1000001, that multiplied together give a palindrome (111111111111).

The spelling of 1111111000001 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one", and thus it is an aban number.