1321211341 has 4 divisors (see below), whose sum is σ = 1390748800. Its totient is φ = 1251673884.

The previous prime is 1321211329. The next prime is 1321211357. The reversal of 1321211341 is 1431121231.

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 a de Polignac number, because none of the positive numbers 2^k-1321211341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69537439 = 1321211341 / (1 + 3 + 2 + 1 + 2 + 1 + 1 + 3 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321214341) 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, 34768701 + ... + 34768738.

It is an arithmetic number, because the mean of its divisors is an integer number (347687200).

Almost surely, 2^1321211341 is an apocalyptic number.

It is an amenable number.

1321211341 is a deficient number, since it is larger than the sum of its proper divisors (69537459).

1321211341 is an equidigital number, since it uses as much as digits as its factorization.

1321211341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69537458.

The product of its digits is 144, while the sum is 19.

The square root of 1321211341 is about 36348.4709582123. The cubic root of 1321211341 is about 1097.2967619884.

Adding to 1321211341 its reverse (1431121231), we get a palindrome (2752332572).

The spelling of 1321211341 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, three hundred forty-one".