111001001009 has 4 divisors (see below), whose sum is σ = 111001803840. Its totient is φ = 111000198180.

The previous prime is 111001000973. The next prime is 111001001021. The reversal of 111001001009 is 900100100111.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111001001009 - 2²⁴ = 110984223793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111001000984 and 111001001002.

It is not an unprimeable number, because it can be changed into a prime (111001001609) 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, 135149 + ... + 490170.

It is an arithmetic number, because the mean of its divisors is an integer number (27750450960).

Almost surely, 2^111001001009 is an apocalyptic number.

It is an amenable number.

111001001009 is a deficient number, since it is larger than the sum of its proper divisors (802831).

111001001009 is an equidigital number, since it uses as much as digits as its factorization.

111001001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802830.

The product of its (nonzero) digits is 9, while the sum is 14.

The spelling of 111001001009 in words is "one hundred eleven billion, one million, one thousand, nine".