1201111100009 has 8 divisors (see below), whose sum is σ = 1213938659208. Its totient is φ = 1188301881600.

The previous prime is 1201111099999. The next prime is 1201111100017. The reversal of 1201111100009 is 9000011111021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1169053987984 + 32057112025 = 1081228^2 + 179045^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201111100009 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 1201111100009.

It is not an unprimeable number, because it can be changed into a prime (1201111100909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4453502 + ... + 4715495.

It is an arithmetic number, because the mean of its divisors is an integer number (151742332401).

Almost surely, 2^{1201111100009} is an apocalyptic number.

It is an amenable number.

1201111100009 is a deficient number, since it is larger than the sum of its proper divisors (12827559199).

1201111100009 is a wasteful number, since it uses less digits than its factorization.

1201111100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170395.

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 1201111100009 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred thousand, nine".