1321213343 has 2 divisors, whose sum is σ = 1321213344. Its totient is φ = 1321213342.

The previous prime is 1321213331. The next prime is 1321213351. The reversal of 1321213343 is 3433121231.

It is a strong prime.

It is an emirp because it is prime and its reverse (3433121231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321213343 - 2³⁰ = 247471519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321213043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606671 + 660606672.

It is an arithmetic number, because the mean of its divisors is an integer number (660606672).

Almost surely, 2^1321213343 is an apocalyptic number.

1321213343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321213343 is an equidigital number, since it uses as much as digits as its factorization.

1321213343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 1321213343 is about 36348.4984971869. The cubic root of 1321213343 is about 1097.2973162240.

Adding to 1321213343 its reverse (3433121231), we get a palindrome (4754334574).

The spelling of 1321213343 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, three hundred forty-three".