1321001103331 has 16 divisors (see below), whose sum is σ = 1653404256000. Its totient is φ = 1027472636448.

The previous prime is 1321001103319. The next prime is 1321001103337. The reversal of 1321001103331 is 1333011001231.

It is a cyclic number.

It is not a de Polignac number, because 1321001103331 - 2⁵ = 1321001103299 is a prime.

It is a super-2 number, since 2×1321001103331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321001103299 and 1321001103308.

It is not an unprimeable number, because it can be changed into a prime (1321001103337) 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, 123015781 + ... + 123026518.

It is an arithmetic number, because the mean of its divisors is an integer number (103337766000).

Almost surely, 2^{1321001103331} is an apocalyptic number.

1321001103331 is a deficient number, since it is larger than the sum of its proper divisors (332403152669).

1321001103331 is a wasteful number, since it uses less digits than its factorization.

1321001103331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246042378.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 1321001103331 its reverse (1333011001231), we get a palindrome (2654012104562).

The spelling of 1321001103331 in words is "one trillion, three hundred twenty-one billion, one million, one hundred three thousand, three hundred thirty-one".