1331121323 has 32 divisors (see below), whose sum is σ = 1634304000. Its totient is φ = 1058896800.

The previous prime is 1331121271. The next prime is 1331121359. The reversal of 1331121323 is 3231211331.

It is a cyclic number.

It is not a de Polignac number, because 1331121323 - 2²⁰ = 1330072747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331121295 and 1331121304.

It is not an unprimeable number, because it can be changed into a prime (1331121223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1586138 + ... + 1586976.

It is an arithmetic number, because the mean of its divisors is an integer number (51072000).

Almost surely, 2^1331121323 is an apocalyptic number.

1331121323 is a deficient number, since it is larger than the sum of its proper divisors (303182677).

1331121323 is a wasteful number, since it uses less digits than its factorization.

1331121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its digits is 324, while the sum is 20.

The square root of 1331121323 is about 36484.5353951506. The cubic root of 1331121323 is about 1100.0334212986.

Adding to 1331121323 its reverse (3231211331), we get a palindrome (4562332654).

The spelling of 1331121323 in words is "one billion, three hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty-three".