11110111001 has 4 divisors (see below), whose sum is σ = 12120121104. Its totient is φ = 10100100900.

The previous prime is 11110110989. The next prime is 11110111009. The reversal of 11110111001 is 10011101111.

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 11110111001 - 2⁶ = 11110110937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11110111001.

It is not an unprimeable number, because it can be changed into a prime (11110111009) 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, 505005035 + ... + 505005056.

It is an arithmetic number, because the mean of its divisors is an integer number (3030030276).

Almost surely, 2^11110111001 is an apocalyptic number.

11110111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11110111001 is a deficient number, since it is larger than the sum of its proper divisors (1010010103).

11110111001 is a wasteful number, since it uses less digits than its factorization.

11110111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010010102.

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

Adding to 11110111001 its reverse (10011101111), we get a palindrome (21121212112).

The spelling of 11110111001 in words is "eleven billion, one hundred ten million, one hundred eleven thousand, one".