1201112309 has 4 divisors (see below), whose sum is σ = 1201235616. Its totient is φ = 1200989004.

The previous prime is 1201112299. The next prime is 1201112333. The reversal of 1201112309 is 9032111021.

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.

It is a cyclic number.

It is not a de Polignac number, because 1201112309 - 2⁴ = 1201112293 is a prime.

It is a super-2 number, since 2×1201112309² = 2885341557662622962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201112359) 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 3 ways as a sum of consecutive naturals, for example, 45659 + ... + 66984.

It is an arithmetic number, because the mean of its divisors is an integer number (300308904).

Almost surely, 2^1201112309 is an apocalyptic number.

It is an amenable number.

1201112309 is a deficient number, since it is larger than the sum of its proper divisors (123307).

1201112309 is a wasteful number, since it uses less digits than its factorization.

1201112309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123306.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1201112309 is about 34657.0672302202. The cubic root of 1201112309 is about 1062.9868024239.

The spelling of 1201112309 in words is "one billion, two hundred one million, one hundred twelve thousand, three hundred nine".