1001203023321 has 12 divisors (see below), whose sum is σ = 1460500781220. Its totient is φ = 660860080800.

The previous prime is 1001203023319. The next prime is 1001203023329. The reversal of 1001203023321 is 1233203021001.

1001203023321 is a `hidden beast` number, since 10 + 0 + 1 + 20 + 302 + 332 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 694880624025 + 306322399296 = 833595^2 + 553464^2 .

It is not a de Polignac number, because 1001203023321 - 2¹ = 1001203023319 is a prime.

It is a super-2 number, since 2×1001203023321² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001203023294 and 1001203023303.

It is not an unprimeable number, because it can be changed into a prime (1001203023329) 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 11 ways as a sum of consecutive naturals, for example, 550715826 + ... + 550717643.

It is an arithmetic number, because the mean of its divisors is an integer number (121708398435).

Almost surely, 2^{1001203023321} is an apocalyptic number.

It is an amenable number.

1001203023321 is a deficient number, since it is larger than the sum of its proper divisors (459297757899).

1001203023321 is a wasteful number, since it uses less digits than its factorization.

1001203023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101433576 (or 1101433573 counting only the distinct ones).

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

Adding to 1001203023321 its reverse (1233203021001), we get a palindrome (2234406044322).

The spelling of 1001203023321 in words is "one trillion, one billion, two hundred three million, twenty-three thousand, three hundred twenty-one".