1011111009 has 8 divisors (see below), whose sum is σ = 1350142080. Its totient is φ = 673076976.

The previous prime is 1011110999. The next prime is 1011111053. The reversal of 1011111009 is 9001111101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011111009 - 2⁴ = 1011110993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011101009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246889 + ... + 250950.

It is an arithmetic number, because the mean of its divisors is an integer number (168767760).

Almost surely, 2^1011111009 is an apocalyptic number.

It is an amenable number.

1011111009 is a deficient number, since it is larger than the sum of its proper divisors (339031071).

1011111009 is an equidigital number, since it uses as much as digits as its factorization.

1011111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498519.

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

The square root of 1011111009 is about 31797.9717749419. The cubic root of 1011111009 is about 1003.6900365486.

The spelling of 1011111009 in words is "one billion, eleven million, one hundred eleven thousand, nine".