1321130213 has 4 divisors (see below), whose sum is σ = 1422755628. Its totient is φ = 1219504800.

The previous prime is 1321130207. The next prime is 1321130227. The reversal of 1321130213 is 3120311231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 644245924 + 676884289 = 25382^2 + 26017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321130213 - 2¹⁰ = 1321129189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321130191 and 1321130200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321130513) 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 3 ways as a sum of consecutive naturals, for example, 50812688 + ... + 50812713.

It is an arithmetic number, because the mean of its divisors is an integer number (355688907).

Almost surely, 2^1321130213 is an apocalyptic number.

1321130213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1321130213 is a deficient number, since it is larger than the sum of its proper divisors (101625415).

1321130213 is a wasteful number, since it uses less digits than its factorization.

1321130213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101625414.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1321130213 is about 36347.3549656643. The cubic root of 1321130213 is about 1097.2743019648.

Adding to 1321130213 its reverse (3120311231), we get a palindrome (4441441444).

The spelling of 1321130213 in words is "one billion, three hundred twenty-one million, one hundred thirty thousand, two hundred thirteen".