1320321231 has 12 divisors (see below), whose sum is σ = 1908237760. Its totient is φ = 879703200.

The previous prime is 1320321161. The next prime is 1320321241. The reversal of 1320321231 is 1321230231.

1320321231 is a `hidden beast` number, since 1 + 320 + 321 + 23 + 1 = 666.

It is not a de Polignac number, because 1320321231 - 2⁷ = 1320321103 is a prime.

It is a super-2 number, since 2×1320321231² = 3486496306058710722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320321241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25870 + ... + 57531.

Almost surely, 2^1320321231 is an apocalyptic number.

1320321231 is a deficient number, since it is larger than the sum of its proper divisors (587916529).

1320321231 is a wasteful number, since it uses less digits than its factorization.

1320321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85166 (or 85163 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1320321231 is about 36336.2247763853. The cubic root of 1320321231 is about 1097.0502876072.

Adding to 1320321231 its reverse (1321230231), we get a palindrome (2641551462).

The spelling of 1320321231 in words is "one billion, three hundred twenty million, three hundred twenty-one thousand, two hundred thirty-one".