1213313213 has 12 divisors (see below), whose sum is σ = 1425144672. Its totient is φ = 1011867120.

The previous prime is 1213313203. The next prime is 1213313279. The reversal of 1213313213 is 3123133121.

It is not a de Polignac number, because 1213313213 - 2²⁸ = 944877757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213313203) 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, 53723 + ... + 72888.

It is an arithmetic number, because the mean of its divisors is an integer number (118762056).

Almost surely, 2^1213313213 is an apocalyptic number.

It is an amenable number.

1213313213 is a deficient number, since it is larger than the sum of its proper divisors (211831459).

1213313213 is an equidigital number, since it uses as much as digits as its factorization.

1213313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126692 (or 126655 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 1213313213 is about 34832.6457938526. The cubic root of 1213313213 is about 1066.5739584248.

Adding to 1213313213 its reverse (3123133121), we get a palindrome (4336446334).

The spelling of 1213313213 in words is "one billion, two hundred thirteen million, three hundred thirteen thousand, two hundred thirteen".