13123220022 has 80 divisors (see below), whose sum is σ = 32622955200. Its totient is φ = 3909299760.

The previous prime is 13123220021. The next prime is 13123220053. The reversal of 13123220022 is 22002232131.

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 = 13123219977 and 13123220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123220021) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42729 + ... + 167547.

It is an arithmetic number, because the mean of its divisors is an integer number (407786940).

Almost surely, 2^13123220022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13123220022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16311477600).

13123220022 is an abundant number, since it is smaller than the sum of its proper divisors (19499735178).

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

13123220022 is a wasteful number, since it uses less digits than its factorization.

13123220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124903 (or 124894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 13123220022 its reverse (22002232131), we get a palindrome (35125452153).

The spelling of 13123220022 in words is "thirteen billion, one hundred twenty-three million, two hundred twenty thousand, twenty-two".