1321202213 has 4 divisors (see below), whose sum is σ = 1366760940. Its totient is φ = 1275643488.

The previous prime is 1321202171. The next prime is 1321202231. The reversal of 1321202213 is 3122021231.

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 287065249 + 1034136964 = 16943^2 + 32158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321202213 - 2¹⁴ = 1321185829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321202191 and 1321202200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321202263) 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, 22779320 + ... + 22779377.

It is an arithmetic number, because the mean of its divisors is an integer number (341690235).

Almost surely, 2^1321202213 is an apocalyptic number.

It is an amenable number.

1321202213 is a deficient number, since it is larger than the sum of its proper divisors (45558727).

1321202213 is an equidigital number, since it uses as much as digits as its factorization.

1321202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45558726.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321202213 is about 36348.3453956298. The cubic root of 1321202213 is about 1097.2942349771.

Adding to 1321202213 its reverse (3122021231), we get a palindrome (4443223444).

The spelling of 1321202213 in words is "one billion, three hundred twenty-one million, two hundred two thousand, two hundred thirteen".