1321144213 has 8 divisors (see below), whose sum is σ = 1382059800. Its totient is φ = 1261252608.

The previous prime is 1321144211. The next prime is 1321144243. The reversal of 1321144213 is 3124411231.

It can be written as a sum of positive squares in 4 ways, for example, as 289578289 + 1031565924 = 17017^2 + 32118^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321144213 - 2¹ = 1321144211 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 (1321144211) 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 7 ways as a sum of consecutive naturals, for example, 253356 + ... + 258517.

It is an arithmetic number, because the mean of its divisors is an integer number (172757475).

Almost surely, 2^1321144213 is an apocalyptic number.

It is an amenable number.

1321144213 is a deficient number, since it is larger than the sum of its proper divisors (60915587).

1321144213 is an equidigital number, since it uses as much as digits as its factorization.

1321144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511991.

The product of its digits is 576, while the sum is 22.

The square root of 1321144213 is about 36347.5475513823. The cubic root of 1321144213 is about 1097.2781778850.

Adding to 1321144213 its reverse (3124411231), we get a palindrome (4445555444).

The spelling of 1321144213 in words is "one billion, three hundred twenty-one million, one hundred forty-four thousand, two hundred thirteen".