1321333129 has 2 divisors, whose sum is σ = 1321333130. Its totient is φ = 1321333128.

The previous prime is 1321333121. The next prime is 1321333151. The reversal of 1321333129 is 9213331231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1321177104 + 156025 = 36348^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321333129 - 2³ = 1321333121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321333097 and 1321333106.

It is not a weakly prime, because it can be changed into another prime (1321333121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660666564 + 660666565.

It is an arithmetic number, because the mean of its divisors is an integer number (660666565).

Almost surely, 2^1321333129 is an apocalyptic number.

It is an amenable number.

1321333129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321333129 is an equidigital number, since it uses as much as digits as its factorization.

1321333129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 28.

The square root of 1321333129 is about 36350.1462032823. The cubic root of 1321333129 is about 1097.3304768751.

The spelling of 1321333129 in words is "one billion, three hundred twenty-one million, three hundred thirty-three thousand, one hundred twenty-nine".