13011013221 has 32 divisors (see below), whose sum is σ = 18358763520. Its totient is φ = 8180149824.

The previous prime is 13011013199. The next prime is 13011013261. The reversal of 13011013221 is 12231011031.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13011013221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13011013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011013261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1423815 + ... + 1432923.

It is an arithmetic number, because the mean of its divisors is an integer number (573711360).

Almost surely, 2^13011013221 is an apocalyptic number.

It is an amenable number.

13011013221 is a deficient number, since it is larger than the sum of its proper divisors (5347750299).

13011013221 is a wasteful number, since it uses less digits than its factorization.

13011013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9425.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13011013221 its reverse (12231011031), we get a palindrome (25242024252).

The spelling of 13011013221 in words is "thirteen billion, eleven million, thirteen thousand, two hundred twenty-one".