1200120036 has 24 divisors (see below), whose sum is σ = 2922032064. Its totient is φ = 382646880.

The previous prime is 1200120017. The next prime is 1200120037. The reversal of 1200120036 is 6300210021.

It is a junction number, because it is equal to n+sod(n) for n = 1200119997 and 1200120024.

It is not an unprimeable number, because it can be changed into a prime (1200120037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2173855 + ... + 2174406.

It is an arithmetic number, because the mean of its divisors is an integer number (121751336).

Almost surely, 2^1200120036 is an apocalyptic number.

It is an amenable number.

1200120036 is an abundant number, since it is smaller than the sum of its proper divisors (1721912028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200120036 is a wasteful number, since it uses less digits than its factorization.

1200120036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348291 (or 4348289 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1200120036 is about 34642.7486784753. The cubic root of 1200120036 is about 1062.6940005801.

Adding to 1200120036 its reverse (6300210021), we get a palindrome (7500330057).

The spelling of 1200120036 in words is "one billion, two hundred million, one hundred twenty thousand, thirty-six".