13023222021 has 12 divisors (see below), whose sum is σ = 18822613420. Its totient is φ = 8676936000.

The previous prime is 13023222007. The next prime is 13023222029. The reversal of 13023222021 is 12022232031.

13023222021 is a `hidden beast` number, since 1 + 302 + 322 + 20 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10032225921 + 2990996100 = 100161^2 + 54690^2 .

It is not a de Polignac number, because 13023222021 - 2¹⁹ = 13022697733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13023221985 and 13023222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023222029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418480 + ... + 448521.

Almost surely, 2^13023222021 is an apocalyptic number.

It is an amenable number.

13023222021 is a deficient number, since it is larger than the sum of its proper divisors (5799391399).

13023222021 is a wasteful number, since it uses less digits than its factorization.

13023222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868676 (or 868673 counting only the distinct ones).

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

Adding to 13023222021 its reverse (12022232031), we get a palindrome (25045454052).

The spelling of 13023222021 in words is "thirteen billion, twenty-three million, two hundred twenty-two thousand, twenty-one".