1331213133121 has 4 divisors (see below), whose sum is σ = 1331654081200. Its totient is φ = 1330772185044.

The previous prime is 1331213133119. The next prime is 1331213133149. The reversal of 1331213133121 is 1213313121331.

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 1331213133121 - 2¹ = 1331213133119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331213133421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220469511 + ... + 220475548.

It is an arithmetic number, because the mean of its divisors is an integer number (332913520300).

Almost surely, 2^{1331213133121} is an apocalyptic number.

It is an amenable number.

1331213133121 is a deficient number, since it is larger than the sum of its proper divisors (440948079).

1331213133121 is an equidigital number, since it uses as much as digits as its factorization.

1331213133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440948078.

The product of its digits is 972, while the sum is 25.

Adding to 1331213133121 its reverse (1213313121331), we get a palindrome (2544526254452).

The spelling of 1331213133121 in words is "one trillion, three hundred thirty-one billion, two hundred thirteen million, one hundred thirty-three thousand, one hundred twenty-one".