1211200320303 has 12 divisors (see below), whose sum is σ = 1751944839840. Its totient is φ = 806343834336.

The previous prime is 1211200320289. The next prime is 1211200320353. The reversal of 1211200320303 is 3030230021121.

1211200320303 is a `hidden beast` number, since 1 + 21 + 1 + 20 + 0 + 320 + 303 = 666.

It is not a de Polignac number, because 1211200320303 - 2¹⁶ = 1211200254767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200320353) 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 11 ways as a sum of consecutive naturals, for example, 93580326 + ... + 93593267.

It is an arithmetic number, because the mean of its divisors is an integer number (145995403320).

Almost surely, 2^{1211200320303} is an apocalyptic number.

1211200320303 is a deficient number, since it is larger than the sum of its proper divisors (540744519537).

1211200320303 is a wasteful number, since it uses less digits than its factorization.

1211200320303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187174318 (or 187174315 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1211200320303 its reverse (3030230021121), we get a palindrome (4241430341424).

The spelling of 1211200320303 in words is "one trillion, two hundred eleven billion, two hundred million, three hundred twenty thousand, three hundred three".