1000000111111 has 4 divisors (see below), whose sum is σ = 1003154685912. Its totient is φ = 996845536312.

The previous prime is 1000000111049. The next prime is 1000000111127. The reversal of 1000000111111 is 1111110000001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1000000111111 - 2⁷ = 1000000110983 is a prime.

It is a Duffinian number.

1000000111111 is a modest number, since divided by 111111 gives 1 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1000000111094 and 1000000111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000000111211) 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, 1577286925 + ... + 1577287558.

It is an arithmetic number, because the mean of its divisors is an integer number (250788671478).

Almost surely, 2^{1000000111111} is an apocalyptic number.

1000000111111 is a deficient number, since it is larger than the sum of its proper divisors (3154574801).

1000000111111 is an equidigital number, since it uses as much as digits as its factorization.

1000000111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154574800.

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

Adding to 1000000111111 its reverse (1111110000001), we get a palindrome (2111110111112).

It can be divided in two parts, 10000001 and 11111, that multiplied together give a palindrome (111110011111).

The spelling of 1000000111111 in words is "one trillion, one hundred eleven thousand, one hundred eleven".