1320211213 has 4 divisors (see below), whose sum is σ = 1321122528. Its totient is φ = 1319299900.

The previous prime is 1320211187. The next prime is 1320211223. The reversal of 1320211213 is 3121120231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320211213 - 2¹³ = 1320203021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320211223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453481 + ... + 456382.

It is an arithmetic number, because the mean of its divisors is an integer number (330280632).

Almost surely, 2^1320211213 is an apocalyptic number.

It is an amenable number.

1320211213 is a deficient number, since it is larger than the sum of its proper divisors (911315).

1320211213 is an equidigital number, since it uses as much as digits as its factorization.

1320211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911314.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1320211213 is about 36334.7108561497. The cubic root of 1320211213 is about 1097.0198155705.

Adding to 1320211213 its reverse (3121120231), we get a palindrome (4441331444).

The spelling of 1320211213 in words is "one billion, three hundred twenty million, two hundred eleven thousand, two hundred thirteen".