12533233521 has 64 divisors (see below), whose sum is σ = 17902596096. Its totient is φ = 7789824000.

The previous prime is 12533233457. The next prime is 12533233613.

It is a happy number.

12533233521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12533233521 - 2⁶ = 12533233457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12533233421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59399106 + ... + 59399316.

It is an arithmetic number, because the mean of its divisors is an integer number (279728064).

Almost surely, 2^12533233521 is an apocalyptic number.

It is an amenable number.

12533233521 is a deficient number, since it is larger than the sum of its proper divisors (5369362575).

12533233521 is a wasteful number, since it uses less digits than its factorization.

12533233521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its digits is 16200, while the sum is 30.

The spelling of 12533233521 in words is "twelve billion, five hundred thirty-three million, two hundred thirty-three thousand, five hundred twenty-one".