13321021311 has 24 divisors (see below), whose sum is σ = 21281638560. Its totient is φ = 7975993536.

The previous prime is 13321021309. The next prime is 13321021321. The reversal of 13321021311 is 11312012331.

13321021311 is a `hidden beast` number, since 1 + 332 + 1 + 0 + 21 + 311 = 666.

It is not a de Polignac number, because 13321021311 - 2¹ = 13321021309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321021321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1534251 + ... + 1542908.

It is an arithmetic number, because the mean of its divisors is an integer number (886734940).

Almost surely, 2^13321021311 is an apocalyptic number.

13321021311 is a deficient number, since it is larger than the sum of its proper divisors (7960617249).

13321021311 is a wasteful number, since it uses less digits than its factorization.

13321021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077215 (or 3077212 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13321021311 its reverse (11312012331), we get a palindrome (24633033642).

The spelling of 13321021311 in words is "thirteen billion, three hundred twenty-one million, twenty-one thousand, three hundred eleven".