13311320021 has 8 divisors (see below), whose sum is σ = 13547179800. Its totient is φ = 13076029440.

The previous prime is 13311320017. The next prime is 13311320023. The reversal of 13311320021 is 12002311331.

It can be written as a sum of positive squares in 4 ways, for example, as 1367890225 + 11943429796 = 36985^2 + 109286^2 .

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 13311320021 - 2² = 13311320017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311320023) 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, 94976 + ... + 188793.

It is an arithmetic number, because the mean of its divisors is an integer number (1693397475).

Almost surely, 2^13311320021 is an apocalyptic number.

It is an amenable number.

13311320021 is a deficient number, since it is larger than the sum of its proper divisors (235859779).

13311320021 is an equidigital number, since it uses as much as digits as its factorization.

13311320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284599.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13311320021 its reverse (12002311331), we get a palindrome (25313631352).

The spelling of 13311320021 in words is "thirteen billion, three hundred eleven million, three hundred twenty thousand, twenty-one".