13011333001221 has 16 divisors (see below), whose sum is σ = 17481578688000. Its totient is φ = 8607714127728.

The previous prime is 13011333001217. The next prime is 13011333001243. The reversal of 13011333001221 is 12210033311031.

It is a happy number.

It is not a de Polignac number, because 13011333001221 - 2² = 13011333001217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011333001421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6557361 + ... + 8307926.

It is an arithmetic number, because the mean of its divisors is an integer number (1092598668000).

Almost surely, 2^{13011333001221} is an apocalyptic number.

It is an amenable number.

13011333001221 is a deficient number, since it is larger than the sum of its proper divisors (4470245686779).

13011333001221 is a wasteful number, since it uses less digits than its factorization.

13011333001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14867528.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 13011333001221 its reverse (12210033311031), we get a palindrome (25221366312252).

The spelling of 13011333001221 in words is "thirteen trillion, eleven billion, three hundred thirty-three million, one thousand, two hundred twenty-one".