13220221001 has 8 divisors (see below), whose sum is σ = 14397130440. Its totient is φ = 12066164352.

The previous prime is 13220220973. The next prime is 13220221013. The reversal of 13220221001 is 10012202231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 743107600 + 12477113401 = 27260^2 + 111701^2 .

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 13220221001 - 2²² = 13216026697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13220221031) 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, 5711990 + ... + 5714303.

It is an arithmetic number, because the mean of its divisors is an integer number (1799641305).

Almost surely, 2^13220221001 is an apocalyptic number.

It is an amenable number.

13220221001 is a deficient number, since it is larger than the sum of its proper divisors (1176909439).

13220221001 is a wasteful number, since it uses less digits than its factorization.

13220221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11426395.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 13220221001 its reverse (10012202231), we get a palindrome (23232423232).

The spelling of 13220221001 in words is "thirteen billion, two hundred twenty million, two hundred twenty-one thousand, one".