1331121313 has 8 divisors (see below), whose sum is σ = 1336227200. Its totient is φ = 1326025728.

The previous prime is 1331121271. The next prime is 1331121359. The reversal of 1331121313 is 3131211331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331121313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331121013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335620 + ... + 339562.

It is an arithmetic number, because the mean of its divisors is an integer number (167028400).

Almost surely, 2^1331121313 is an apocalyptic number.

It is an amenable number.

1331121313 is a deficient number, since it is larger than the sum of its proper divisors (5105887).

1331121313 is an equidigital number, since it uses as much as digits as its factorization.

1331121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its digits is 162, while the sum is 19.

The square root of 1331121313 is about 36484.5352581063. The cubic root of 1331121313 is about 1100.0334185439.

Adding to 1331121313 its reverse (3131211331), we get a palindrome (4462332644).

The spelling of 1331121313 in words is "one billion, three hundred thirty-one million, one hundred twenty-one thousand, three hundred thirteen".