1201108909 has 16 divisors (see below), whose sum is σ = 1612679040. Its totient is φ = 863933760.

The previous prime is 1201108907. The next prime is 1201108927. The reversal of 1201108909 is 9098011021.

It is a cyclic number.

It is not a de Polignac number, because 1201108909 - 2¹ = 1201108907 is a prime.

It is a super-2 number, since 2×1201108909² = 2885325222558340562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201108903) 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, 598954 + ... + 600955.

It is an arithmetic number, because the mean of its divisors is an integer number (100792440).

Almost surely, 2^1201108909 is an apocalyptic number.

It is an amenable number.

1201108909 is a deficient number, since it is larger than the sum of its proper divisors (411570131).

1201108909 is a wasteful number, since it uses less digits than its factorization.

1201108909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199940.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1201108909 is about 34657.0181781411. The cubic root of 1201108909 is about 1062.9857994207.

The spelling of 1201108909 in words is "one billion, two hundred one million, one hundred eight thousand, nine hundred nine".