12124434221 has 8 divisors (see below), whose sum is σ = 12844178424. Its totient is φ = 11405416960.

The previous prime is 12124434193. The next prime is 12124434227. The reversal of 12124434221 is 12243442121.

It can be written as a sum of positive squares in 4 ways, for example, as 578931721 + 11545502500 = 24061^2 + 107450^2 .

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

It is not a de Polignac number, because 12124434221 - 2³⁰ = 11050692397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124434227) 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, 147200 + ... + 214281.

It is an arithmetic number, because the mean of its divisors is an integer number (1605522303).

Almost surely, 2^12124434221 is an apocalyptic number.

It is an amenable number.

12124434221 is a deficient number, since it is larger than the sum of its proper divisors (719744203).

12124434221 is a wasteful number, since it uses less digits than its factorization.

12124434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363471.

The product of its digits is 3072, while the sum is 26.

Adding to 12124434221 its reverse (12243442121), we get a palindrome (24367876342).

The spelling of 12124434221 in words is "twelve billion, one hundred twenty-four million, four hundred thirty-four thousand, two hundred twenty-one".