11111001009 has 16 divisors (see below), whose sum is σ = 15120219840. Its totient is φ = 7255465920.

The previous prime is 11111000993. The next prime is 11111001029. The reversal of 11111001009 is 90010011111.

It is not a de Polignac number, because 11111001009 - 2⁴ = 11111000993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111001029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64282 + ... + 162339.

It is an arithmetic number, because the mean of its divisors is an integer number (945013740).

Almost surely, 2^11111001009 is an apocalyptic number.

It is an amenable number.

11111001009 is a deficient number, since it is larger than the sum of its proper divisors (4009218831).

11111001009 is a wasteful number, since it uses less digits than its factorization.

11111001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226960.

The product of its (nonzero) digits is 9, while the sum is 15.

The spelling of 11111001009 in words is "eleven billion, one hundred eleven million, one thousand, nine".