11021312321 has 8 divisors (see below), whose sum is σ = 11232720000. Its totient is φ = 10811465280.

The previous prime is 11021312297. The next prime is 11021312353. The reversal of 11021312321 is 12321312011.

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 11021312321 - 2⁶ = 11021312257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11021312321.

It is not an unprimeable number, because it can be changed into a prime (11021312371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375896 + ... + 404153.

It is an arithmetic number, because the mean of its divisors is an integer number (1404090000).

Almost surely, 2^11021312321 is an apocalyptic number.

It is an amenable number.

11021312321 is a deficient number, since it is larger than the sum of its proper divisors (211407679).

11021312321 is an equidigital number, since it uses as much as digits as its factorization.

11021312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780319.

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

Adding to 11021312321 its reverse (12321312011), we get a palindrome (23342624332).

The spelling of 11021312321 in words is "eleven billion, twenty-one million, three hundred twelve thousand, three hundred twenty-one".