13001123221 has 16 divisors (see below), whose sum is σ = 13874540544. Its totient is φ = 12154132144.

The previous prime is 13001123207. The next prime is 13001123231. The reversal of 13001123221 is 12232110031.

It is not a de Polignac number, because 13001123221 - 2⁹ = 13001122709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13001123195 and 13001123204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001123231) 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, 795090 + ... + 811276.

It is an arithmetic number, because the mean of its divisors is an integer number (867158784).

Almost surely, 2^13001123221 is an apocalyptic number.

It is an amenable number.

13001123221 is a deficient number, since it is larger than the sum of its proper divisors (873417323).

13001123221 is a wasteful number, since it uses less digits than its factorization.

13001123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17000.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13001123221 its reverse (12232110031), we get a palindrome (25233233252).

The spelling of 13001123221 in words is "thirteen billion, one million, one hundred twenty-three thousand, two hundred twenty-one".