12225652221 has 16 divisors (see below), whose sum is σ = 17726226624. Its totient is φ = 7463672064.

The previous prime is 12225652217. The next prime is 12225652237.

12225652221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12225652221 - 2² = 12225652217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225652121) 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, 3237555 + ... + 3241328.

It is an arithmetic number, because the mean of its divisors is an integer number (1107889164).

Almost surely, 2^12225652221 is an apocalyptic number.

It is an amenable number.

12225652221 is a deficient number, since it is larger than the sum of its proper divisors (5500574403).

12225652221 is a wasteful number, since it uses less digits than its factorization.

12225652221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478940.

The product of its digits is 9600, while the sum is 30.

The spelling of 12225652221 in words is "twelve billion, two hundred twenty-five million, six hundred fifty-two thousand, two hundred twenty-one".