12131422221 has 8 divisors (see below), whose sum is σ = 16176061440. Its totient is φ = 8087198912.

The previous prime is 12131422217. The next prime is 12131422229. The reversal of 12131422221 is 12222413121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12131422221 - 2² = 12131422217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131422229) 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, 27981 + ... + 158258.

It is an arithmetic number, because the mean of its divisors is an integer number (2022007680).

Almost surely, 2^12131422221 is an apocalyptic number.

It is an amenable number.

12131422221 is a deficient number, since it is larger than the sum of its proper divisors (4044639219).

12131422221 is a wasteful number, since it uses less digits than its factorization.

12131422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207955.

The product of its digits is 384, while the sum is 21.

Adding to 12131422221 its reverse (12222413121), we get a palindrome (24353835342).

The spelling of 12131422221 in words is "twelve billion, one hundred thirty-one million, four hundred twenty-two thousand, two hundred twenty-one".