1321341011 has 4 divisors (see below), whose sum is σ = 1322004672. Its totient is φ = 1320677352.

The previous prime is 1321341001. The next prime is 1321341013. The reversal of 1321341011 is 1101431231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321341011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321341013) 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, 328835 + ... + 332828.

It is an arithmetic number, because the mean of its divisors is an integer number (330501168).

Almost surely, 2^1321341011 is an apocalyptic number.

1321341011 is a deficient number, since it is larger than the sum of its proper divisors (663661).

1321341011 is an equidigital number, since it uses as much as digits as its factorization.

1321341011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663660.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1321341011 is about 36350.2546208414. The cubic root of 1321341011 is about 1097.3326587982.

Adding to 1321341011 its reverse (1101431231), we get a palindrome (2422772242).

The spelling of 1321341011 in words is "one billion, three hundred twenty-one million, three hundred forty-one thousand, eleven".