13020111321 has 16 divisors (see below), whose sum is σ = 20480176128. Its totient is φ = 7200061200.

The previous prime is 13020111319. The next prime is 13020111343. The reversal of 13020111321 is 12311102031.

It is a happy number.

It is not a de Polignac number, because 13020111321 - 2¹ = 13020111319 is a prime.

It is a super-2 number, since 2×13020111321² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13020111321.

It is not an unprimeable number, because it can be changed into a prime (13020111301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9999435 + ... + 10000736.

It is an arithmetic number, because the mean of its divisors is an integer number (1280011008).

Almost surely, 2^13020111321 is an apocalyptic number.

It is an amenable number.

13020111321 is a deficient number, since it is larger than the sum of its proper divisors (7460064807).

13020111321 is a wasteful number, since it uses less digits than its factorization.

13020111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000212.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13020111321 its reverse (12311102031), we get a palindrome (25331213352).

The spelling of 13020111321 in words is "thirteen billion, twenty million, one hundred eleven thousand, three hundred twenty-one".