12132250221 has 32 divisors (see below), whose sum is σ = 19982921728. Its totient is φ = 6375775680.

The previous prime is 12132250217. The next prime is 12132250231. The reversal of 12132250221 is 12205223121.

It is not a de Polignac number, because 12132250221 - 2² = 12132250217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132250231) 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, 8011 + ... + 155976.

It is an arithmetic number, because the mean of its divisors is an integer number (624466304).

Almost surely, 2^12132250221 is an apocalyptic number.

It is an amenable number.

12132250221 is a deficient number, since it is larger than the sum of its proper divisors (7850671507).

12132250221 is a wasteful number, since it uses less digits than its factorization.

12132250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164281.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12132250221 its reverse (12205223121), we get a palindrome (24337473342).

The spelling of 12132250221 in words is "twelve billion, one hundred thirty-two million, two hundred fifty thousand, two hundred twenty-one".