13011022221 has 16 divisors (see below), whose sum is σ = 17500459200. Its totient is φ = 8598066048.

The previous prime is 13011022177. The next prime is 13011022243. The reversal of 13011022221 is 12222011031.

It is not a de Polignac number, because 13011022221 - 2¹¹ = 13011020173 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13011022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011022291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164385 + ... + 230313.

It is an arithmetic number, because the mean of its divisors is an integer number (1093778700).

Almost surely, 2^13011022221 is an apocalyptic number.

It is an amenable number.

13011022221 is a deficient number, since it is larger than the sum of its proper divisors (4489436979).

13011022221 is a wasteful number, since it uses less digits than its factorization.

13011022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66508.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 13011022221 its reverse (12222011031), we get a palindrome (25233033252).

The spelling of 13011022221 in words is "thirteen billion, eleven million, twenty-two thousand, two hundred twenty-one".