12053434221 has 6 divisors (see below), whose sum is σ = 17410516110. Its totient is φ = 8035622808.

The previous prime is 12053434219. The next prime is 12053434247. The reversal of 12053434221 is 12243435021.

12053434221 is a `hidden beast` number, since 1 + 2 + 0 + 5 + 3 + 434 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8834120100 + 3219314121 = 93990^2 + 56739^2 .

It is not a de Polignac number, because 12053434221 - 2¹ = 12053434219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12053434271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669635226 + ... + 669635243.

It is an arithmetic number, because the mean of its divisors is an integer number (2901752685).

Almost surely, 2^12053434221 is an apocalyptic number.

It is an amenable number.

12053434221 is a deficient number, since it is larger than the sum of its proper divisors (5357081889).

12053434221 is a wasteful number, since it uses less digits than its factorization.

12053434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339270475 (or 1339270472 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12053434221 its reverse (12243435021), we get a palindrome (24296869242).

The spelling of 12053434221 in words is "twelve billion, fifty-three million, four hundred thirty-four thousand, two hundred twenty-one".