1320213123 has 12 divisors (see below), whose sum is σ = 1924471120. Its totient is φ = 872066736.

The previous prime is 1320213101. The next prime is 1320213211. The reversal of 1320213123 is 3213120231.

It is not a de Polignac number, because 1320213123 - 2⁸ = 1320212867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320213096 and 1320213105.

It is not an unprimeable number, because it can be changed into a prime (1320212123) 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, 671911 + ... + 673872.

Almost surely, 2^1320213123 is an apocalyptic number.

1320213123 is a deficient number, since it is larger than the sum of its proper divisors (604257997).

1320213123 is a wasteful number, since it uses less digits than its factorization.

1320213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345898 (or 1345895 counting only the distinct ones).

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

The square root of 1320213123 is about 36334.7371395473. The cubic root of 1320213123 is about 1097.0203446038.

Adding to 1320213123 its reverse (3213120231), we get a palindrome (4533333354).

The spelling of 1320213123 in words is "one billion, three hundred twenty million, two hundred thirteen thousand, one hundred twenty-three".