1331221013113 has 4 divisors (see below), whose sum is σ = 1337034205540. Its totient is φ = 1325407820688.

The previous prime is 1331221013099. The next prime is 1331221013147. The reversal of 1331221013113 is 3113101221331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1165529682409 + 165691330704 = 1079597^2 + 407052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331221013113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331221013153) 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 3 ways as a sum of consecutive naturals, for example, 2906595870 + ... + 2906596327.

It is an arithmetic number, because the mean of its divisors is an integer number (334258551385).

Almost surely, 2^{1331221013113} is an apocalyptic number.

It is an amenable number.

1331221013113 is a deficient number, since it is larger than the sum of its proper divisors (5813192427).

1331221013113 is an equidigital number, since it uses as much as digits as its factorization.

1331221013113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5813192426.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1331221013113 its reverse (3113101221331), we get a palindrome (4444322234444).

The spelling of 1331221013113 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-one million, thirteen thousand, one hundred thirteen".