1321331521003 has 8 divisors (see below), whose sum is σ = 1422994986000. Its totient is φ = 1219671281568.

The previous prime is 1321331520991. The next prime is 1321331521009. The reversal of 1321331521003 is 3001251331231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321331521003 - 2¹³ = 1321331512811 is a prime.

It is a super-2 number, since 2×1321331521003² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321331521009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80553 + ... + 1627621.

It is an arithmetic number, because the mean of its divisors is an integer number (177874373250).

Almost surely, 2^{1321331521003} is an apocalyptic number.

1321331521003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321331521003 is a deficient number, since it is larger than the sum of its proper divisors (101663464997).

1321331521003 is a wasteful number, since it uses less digits than its factorization.

1321331521003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612781.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 1321331521003 its reverse (3001251331231), we get a palindrome (4322582852234).

The spelling of 1321331521003 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, five hundred twenty-one thousand, three".