1001000111111 has 24 divisors (see below), whose sum is σ = 1354181983392. Its totient is φ = 720000072000.

The previous prime is 1001000111077. The next prime is 1001000111113. The reversal of 1001000111111 is 1111110001001.

It is not a de Polignac number, because 1001000111111 - 2¹⁰ = 1001000110087 is a prime.

1001000111111 is a modest number, since divided by 111111 gives 1001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001000111113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45443540 + ... + 45465561.

It is an arithmetic number, because the mean of its divisors is an integer number (56424249308).

Almost surely, 2^{1001000111111} is an apocalyptic number.

1001000111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001000111111 is a deficient number, since it is larger than the sum of its proper divisors (353181872281).

1001000111111 is a wasteful number, since it uses less digits than its factorization.

1001000111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90909143 (or 90909132 counting only the distinct ones).

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

Adding to 1001000111111 its reverse (1111110001001), we get a palindrome (2112110112112).

It can be divided in two parts, 1001000 and 111111, that added together give a palindrome (1112111).

The spelling of 1001000111111 in words is "one trillion, one billion, one hundred eleven thousand, one hundred eleven".