1331132013221 has 4 divisors (see below), whose sum is σ = 1362088571712. Its totient is φ = 1300175454732.

The previous prime is 1331132013199. The next prime is 1331132013251. The reversal of 1331132013221 is 1223102311331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1331132013221 - 2⁶ = 1331132013157 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 (1331132013251) 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, 15478279181 + ... + 15478279266.

It is an arithmetic number, because the mean of its divisors is an integer number (340522142928).

Almost surely, 2^{1331132013221} is an apocalyptic number.

It is an amenable number.

1331132013221 is a deficient number, since it is larger than the sum of its proper divisors (30956558491).

1331132013221 is an equidigital number, since it uses as much as digits as its factorization.

1331132013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30956558490.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331132013221 its reverse (1223102311331), we get a palindrome (2554234324552).

The spelling of 1331132013221 in words is "one trillion, three hundred thirty-one billion, one hundred thirty-two million, thirteen thousand, two hundred twenty-one".