1200120011109 has 48 divisors (see below), whose sum is σ = 1845760583680. Its totient is φ = 749283696000.

The previous prime is 1200120011081. The next prime is 1200120011117. The reversal of 1200120011109 is 9011100210021.

It is a happy number.

It is not a de Polignac number, because 1200120011109 - 2¹⁶ = 1200119945573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200120011091 and 1200120011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200120011159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5915859 + ... + 6115359.

Almost surely, 2^{1200120011109} is an apocalyptic number.

1200120011109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1200120011109 is a deficient number, since it is larger than the sum of its proper divisors (645640572571).

1200120011109 is a wasteful number, since it uses less digits than its factorization.

1200120011109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199930 (or 199927 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 1200120011109 in words is "one trillion, two hundred billion, one hundred twenty million, eleven thousand, one hundred nine".