1201100009 has 8 divisors (see below), whose sum is σ = 1207408608. Its totient is φ = 1194804000.

The previous prime is 1201099981. The next prime is 1201100023. The reversal of 1201100009 is 9000011021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201100009 - 2¹² = 1201095913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201099966 and 1201100002.

It is not an unprimeable number, because it can be changed into a prime (1201100059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232634 + ... + 237740.

It is an arithmetic number, because the mean of its divisors is an integer number (150926076).

Almost surely, 2^1201100009 is an apocalyptic number.

It is an amenable number.

1201100009 is a deficient number, since it is larger than the sum of its proper divisors (6308599).

1201100009 is an equidigital number, since it uses as much as digits as its factorization.

1201100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1201100009 is about 34656.8897767818. The cubic root of 1201100009 is about 1062.9831739033.

The spelling of 1201100009 in words is "one billion, two hundred one million, one hundred thousand, nine".