1321115363 has 2 divisors, whose sum is σ = 1321115364. Its totient is φ = 1321115362.

The previous prime is 1321115357. The next prime is 1321115443. The reversal of 1321115363 is 3635111231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321115363 - 2⁴ = 1321115347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1321115563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660557681 + 660557682.

It is an arithmetic number, because the mean of its divisors is an integer number (660557682).

Almost surely, 2^1321115363 is an apocalyptic number.

1321115363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321115363 is an equidigital number, since it uses as much as digits as its factorization.

1321115363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 1321115363 is about 36347.1506861267. The cubic root of 1321115363 is about 1097.2701906909.

Adding to 1321115363 its reverse (3635111231), we get a palindrome (4956226594).

The spelling of 1321115363 in words is "one billion, three hundred twenty-one million, one hundred fifteen thousand, three hundred sixty-three".