1200208120 has 32 divisors (see below), whose sum is σ = 2717050320. Its totient is φ = 477135360.

The previous prime is 1200208117. The next prime is 1200208133. The reversal of 1200208120 is 218020021.

It is a junction number, because it is equal to n+sod(n) for n = 1200208094 and 1200208103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85521 + ... + 98560.

Almost surely, 2^1200208120 is an apocalyptic number.

1200208120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200208120 is an abundant number, since it is smaller than the sum of its proper divisors (1516842200).

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

1200208120 is a wasteful number, since it uses less digits than its factorization.

1200208120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184255 (or 184251 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1200208120 is about 34644.0199745930. The cubic root of 1200208120 is about 1062.7199991040.

Adding to 1200208120 its reverse (218020021), we get a palindrome (1418228141).

The spelling of 1200208120 in words is "one billion, two hundred million, two hundred eight thousand, one hundred twenty".