13022021 has 4 divisors (see below), whose sum is σ = 13070700. Its totient is φ = 12973344.

The previous prime is 13022003. The next prime is 13022027. The reversal of 13022021 is 12022031.

It is a happy number.

13022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8008900 + 5013121 = 2830^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 13022021 - 2¹⁴ = 13005637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 13021993 and 13022011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23936 + ... + 24473.

It is an arithmetic number, because the mean of its divisors is an integer number (3267675).

Almost surely, 2^13022021 is an apocalyptic number.

It is an amenable number.

13022021 is a deficient number, since it is larger than the sum of its proper divisors (48679).

13022021 is an equidigital number, since it uses as much as digits as its factorization.

13022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48678.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 13022021 is about 3608.6037466034. The cubic root of 13022021 is about 235.2661598804.

Adding to 13022021 its reverse (12022031), we get a palindrome (25044052).

The spelling of 13022021 in words is "thirteen million, twenty-two thousand, twenty-one".