1001220123303 has 16 divisors (see below), whose sum is σ = 1501601285600. Its totient is φ = 667480080744.

The previous prime is 1001220123301. The next prime is 1001220123359. The reversal of 1001220123303 is 3033210221001.

1001220123303 is a `hidden beast` number, since 100 + 1 + 220 + 12 + 330 + 3 = 666.

It is not a de Polignac number, because 1001220123303 - 2¹ = 1001220123301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001220123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228900448 + ... + 228904821.

It is an arithmetic number, because the mean of its divisors is an integer number (93850080350).

Almost surely, 2^{1001220123303} is an apocalyptic number.

1001220123303 is a deficient number, since it is larger than the sum of its proper divisors (500381162297).

1001220123303 is an frugal number, since it uses more digits than its factorization.

1001220123303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457805290 (or 457805272 counting only the distinct ones).

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

Adding to 1001220123303 its reverse (3033210221001), we get a palindrome (4034430344304).

The spelling of 1001220123303 in words is "one trillion, one billion, two hundred twenty million, one hundred twenty-three thousand, three hundred three".