1200120203 has 4 divisors (see below), whose sum is σ = 1207057488. Its totient is φ = 1193182920.

The previous prime is 1200120179. The next prime is 1200120217. The reversal of 1200120203 is 3020210021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3020210021 = 17 ⋅177659413.

It is a cyclic number.

It is not a de Polignac number, because 1200120203 - 2⁶ = 1200120139 is a prime.

It is a super-2 number, since 2×1200120203² = 2880577003297522418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200120223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3468383 + ... + 3468728.

It is an arithmetic number, because the mean of its divisors is an integer number (301764372).

Almost surely, 2^1200120203 is an apocalyptic number.

1200120203 is a deficient number, since it is larger than the sum of its proper divisors (6937285).

1200120203 is an equidigital number, since it uses as much as digits as its factorization.

1200120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6937284.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1200120203 is about 34642.7510887920. The cubic root of 1200120203 is about 1062.6940498724.

Adding to 1200120203 its reverse (3020210021), we get a palindrome (4220330224).

The spelling of 1200120203 in words is "one billion, two hundred million, one hundred twenty thousand, two hundred three".