1321130113221 has 16 divisors (see below), whose sum is σ = 1768473884480. Its totient is φ = 877272491520.

The previous prime is 1321130113187. The next prime is 1321130113243. The reversal of 1321130113221 is 1223110311231.

It is not a de Polignac number, because 1321130113221 - 2¹¹ = 1321130111173 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 (1321130113021) 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, 1702581 + ... + 2353941.

It is an arithmetic number, because the mean of its divisors is an integer number (110529617780).

Almost surely, 2^{1321130113221} is an apocalyptic number.

It is an amenable number.

1321130113221 is a deficient number, since it is larger than the sum of its proper divisors (447343771259).

1321130113221 is a wasteful number, since it uses less digits than its factorization.

1321130113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654036.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1321130113221 its reverse (1223110311231), we get a palindrome (2544240424452).

The spelling of 1321130113221 in words is "one trillion, three hundred twenty-one billion, one hundred thirty million, one hundred thirteen thousand, two hundred twenty-one".