1321331129 has 8 divisors (see below), whose sum is σ = 1327052160. Its totient is φ = 1315620496.

The previous prime is 1321331111. The next prime is 1321331159. The reversal of 1321331129 is 9211331231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321331129 - 2⁸ = 1321330873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321331098 and 1321331107.

It is not an unprimeable number, because it can be changed into a prime (1321331159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347762 + ... + 351540.

It is an arithmetic number, because the mean of its divisors is an integer number (165881520).

Almost surely, 2^1321331129 is an apocalyptic number.

It is an amenable number.

1321331129 is a deficient number, since it is larger than the sum of its proper divisors (5721031).

1321331129 is a wasteful number, since it uses less digits than its factorization.

1321331129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5199.

The product of its digits is 972, while the sum is 26.

The square root of 1321331129 is about 36350.1186930662. The cubic root of 1321331129 is about 1097.3299232267.

The spelling of 1321331129 in words is "one billion, three hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-nine".