13221252511 has 16 divisors (see below), whose sum is σ = 13849552800. Its totient is φ = 12619844160.

The previous prime is 13221252479. The next prime is 13221252553. The reversal of 13221252511 is 11525212231.

It is a happy number.

It is not a de Polignac number, because 13221252511 - 2⁵ = 13221252479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221252211) 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, 2167576 + ... + 2173666.

It is an arithmetic number, because the mean of its divisors is an integer number (865597050).

Almost surely, 2^13221252511 is an apocalyptic number.

13221252511 is a deficient number, since it is larger than the sum of its proper divisors (628300289).

13221252511 is an frugal number, since it uses more digits than its factorization.

13221252511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267 (or 6209 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

Adding to 13221252511 its reverse (11525212231), we get a palindrome (24746464742).

The spelling of 13221252511 in words is "thirteen billion, two hundred twenty-one million, two hundred fifty-two thousand, five hundred eleven".