1803121201 has 16 divisors (see below), whose sum is σ = 2209559040. Its totient is φ = 1436198400.

The previous prime is 1803121171. The next prime is 1803121241. The reversal of 1803121201 is 1021213081.

It is not a de Polignac number, because 1803121201 - 2²⁷ = 1668903473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1803121241) 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 15 ways as a sum of consecutive naturals, for example, 86500 + ... + 105301.

It is an arithmetic number, because the mean of its divisors is an integer number (138097440).

Almost surely, 2^1803121201 is an apocalyptic number.

It is an amenable number.

1803121201 is a deficient number, since it is larger than the sum of its proper divisors (406437839).

1803121201 is a wasteful number, since it uses less digits than its factorization.

1803121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191904.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1803121201 is about 42463.1746458034. The cubic root of 1803121201 is about 1217.1430958881.

Adding to 1803121201 its reverse (1021213081), we get a palindrome (2824334282).

The spelling of 1803121201 in words is "one billion, eight hundred three million, one hundred twenty-one thousand, two hundred one".