13022012221 has 8 divisors (see below), whose sum is σ = 13112233560. Its totient is φ = 12931883328.

The previous prime is 13022012219. The next prime is 13022012261. The reversal of 13022012221 is 12221022031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7225 + 13022004996 = 85^2 + 114114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13022012221 - 2¹ = 13022012219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13022012195 and 13022012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022012261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272595 + ... + 316783.

It is an arithmetic number, because the mean of its divisors is an integer number (1639029195).

Almost surely, 2^13022012221 is an apocalyptic number.

It is an amenable number.

13022012221 is a deficient number, since it is larger than the sum of its proper divisors (90221339).

13022012221 is a wasteful number, since it uses less digits than its factorization.

13022012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46223.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13022012221 its reverse (12221022031), we get a palindrome (25243034252).

The spelling of 13022012221 in words is "thirteen billion, twenty-two million, twelve thousand, two hundred twenty-one".