13013221122 has 144 divisors (see below), whose sum is σ = 31998395520. Its totient is φ = 3817344960.

The previous prime is 13013221121. The next prime is 13013221139. The reversal of 13013221122 is 22112231031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13013221095 and 13013221104.

It is not an unprimeable number, because it can be changed into a prime (13013221121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9118573 + ... + 9119999.

It is an arithmetic number, because the mean of its divisors is an integer number (222211080).

Almost surely, 2^13013221122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13013221122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15999197760).

13013221122 is an abundant number, since it is smaller than the sum of its proper divisors (18985174398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13013221122 is a wasteful number, since it uses less digits than its factorization.

13013221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1575 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13013221122 its reverse (22112231031), we get a palindrome (35125452153).

Subtracting 13013221122 from its reverse (22112231031), we obtain a palindrome (9099009909).

The spelling of 13013221122 in words is "thirteen billion, thirteen million, two hundred twenty-one thousand, one hundred twenty-two".