1320013221121 has 16 divisors (see below), whose sum is σ = 1620393712000. Its totient is φ = 1071890429904.

The previous prime is 1320013221113. The next prime is 1320013221143. The reversal of 1320013221121 is 1211223100231.

It is not a de Polignac number, because 1320013221121 - 2³ = 1320013221113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1320013221721) 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, 101268090 + ... + 101281123.

It is an arithmetic number, because the mean of its divisors is an integer number (101274607000).

Almost surely, 2^{1320013221121} is an apocalyptic number.

It is an amenable number.

1320013221121 is a deficient number, since it is larger than the sum of its proper divisors (300380490879).

1320013221121 is an equidigital number, since it uses as much as digits as its factorization.

1320013221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202549253 (or 202549239 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1320013221121 its reverse (1211223100231), we get a palindrome (2531236321352).

The spelling of 1320013221121 in words is "one trillion, three hundred twenty billion, thirteen million, two hundred twenty-one thousand, one hundred twenty-one".