1320213231 has 12 divisors (see below), whose sum is σ = 1907946352. Its totient is φ = 879693696.

The previous prime is 1320213229. The next prime is 1320213281. The reversal of 1320213231 is 1323120231.

1320213231 is a `hidden beast` number, since 1 + 320 + 21 + 323 + 1 = 666.

It is not a de Polignac number, because 1320213231 - 2¹ = 1320213229 is a prime.

It is a super-2 number, since 2×1320213231² = 3485925950614918722, 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 (1320213211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18211 + ... + 54516.

Almost surely, 2^1320213231 is an apocalyptic number.

1320213231 is a deficient number, since it is larger than the sum of its proper divisors (587733121).

1320213231 is a wasteful number, since it uses less digits than its factorization.

1320213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74750 (or 74747 counting only the distinct ones).

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

The square root of 1320213231 is about 36334.7386257284. The cubic root of 1320213231 is about 1097.0203745177.

Adding to 1320213231 its reverse (1323120231), we get a palindrome (2643333462).

The spelling of 1320213231 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, two hundred thirty-one".