1001320111103 has 16 divisors (see below), whose sum is σ = 1084976847360. Its totient is φ = 918612608736.

The previous prime is 1001320111067. The next prime is 1001320111111. The reversal of 1001320111103 is 3011110231001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1001320111103 - 2³⁰ = 1000246369279 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 (1001320116103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14787638 + ... + 14855196.

It is an arithmetic number, because the mean of its divisors is an integer number (67811052960).

Almost surely, 2^{1001320111103} is an apocalyptic number.

1001320111103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1001320111103 is a deficient number, since it is larger than the sum of its proper divisors (83656736257).

1001320111103 is a wasteful number, since it uses less digits than its factorization.

1001320111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74566.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 1001320111103 its reverse (3011110231001), we get a palindrome (4012430342104).

The spelling of 1001320111103 in words is "one trillion, one billion, three hundred twenty million, one hundred eleven thousand, one hundred three".