12224011521 has 8 divisors (see below), whose sum is σ = 16356275680. Its totient is φ = 8120544192.

The previous prime is 12224011507. The next prime is 12224011523. The reversal of 12224011521 is 12511042221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12224011521 - 2¹⁴ = 12223995137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12224011523) 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, 7198216 + ... + 7199913.

It is an arithmetic number, because the mean of its divisors is an integer number (2044534460).

Almost surely, 2^12224011521 is an apocalyptic number.

It is an amenable number.

12224011521 is a deficient number, since it is larger than the sum of its proper divisors (4132264159).

12224011521 is a wasteful number, since it uses less digits than its factorization.

12224011521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14398415.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 12224011521 its reverse (12511042221), we get a palindrome (24735053742).

The spelling of 12224011521 in words is "twelve billion, two hundred twenty-four million, eleven thousand, five hundred twenty-one".