1320120331 has 2 divisors, whose sum is σ = 1320120332. Its totient is φ = 1320120330.

The previous prime is 1320120317. The next prime is 1320120341. The reversal of 1320120331 is 1330210231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320120331 - 2¹³ = 1320112139 is a prime.

It is a super-2 number, since 2×1320120331² = 3485435376639099122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320120341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660060165 + 660060166.

It is an arithmetic number, because the mean of its divisors is an integer number (660060166).

Almost surely, 2^1320120331 is an apocalyptic number.

1320120331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320120331 is an equidigital number, since it uses as much as digits as its factorization.

1320120331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1320120331 is about 36333.4602123167. The cubic root of 1320120331 is about 1096.9946424160.

Adding to 1320120331 its reverse (1330210231), we get a palindrome (2650330562).

The spelling of 1320120331 in words is "one billion, three hundred twenty million, one hundred twenty thousand, three hundred thirty-one".