13021231122 has 12 divisors (see below), whose sum is σ = 28212667470. Its totient is φ = 4340410368.

The previous prime is 13021231121. The next prime is 13021231127. The reversal of 13021231122 is 22113212031.

It can be written as a sum of positive squares in only one way, i.e., 7988605641 + 5032625481 = 89379^2 + 70941^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 723401729 = 13021231122 / (1 + 3 + 0 + 2 + 1 + 2 + 3 + 1 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 13021231095 and 13021231104.

It is not an unprimeable number, because it can be changed into a prime (13021231121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361700847 + ... + 361700882.

Almost surely, 2^13021231122 is an apocalyptic number.

13021231122 is an abundant number, since it is smaller than the sum of its proper divisors (15191436348).

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

13021231122 is a wasteful number, since it uses less digits than its factorization.

13021231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723401737 (or 723401734 counting only the distinct ones).

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

Adding to 13021231122 its reverse (22113212031), we get a palindrome (35134443153).

The spelling of 13021231122 in words is "thirteen billion, twenty-one million, two hundred thirty-one thousand, one hundred twenty-two".