12111001009 has 16 divisors (see below), whose sum is σ = 12628535040. Its totient is φ = 11607261120.

The previous prime is 12111000989. The next prime is 12111001039. The reversal of 12111001009 is 90010011121.

It is a cyclic number.

It is not a de Polignac number, because 12111001009 - 2²¹ = 12108903857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111000983 and 12111001001.

It is not an unprimeable number, because it can be changed into a prime (12111001039) 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, 395404 + ... + 424930.

It is an arithmetic number, because the mean of its divisors is an integer number (789283440).

Almost surely, 2^12111001009 is an apocalyptic number.

It is an amenable number.

12111001009 is a deficient number, since it is larger than the sum of its proper divisors (517534031).

12111001009 is a wasteful number, since it uses less digits than its factorization.

12111001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29760.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 12111001009 in words is "twelve billion, one hundred eleven million, one thousand, nine".