12512214321 has 4 divisors (see below), whose sum is σ = 16682952432. Its totient is φ = 8341476212.

The previous prime is 12512214317. The next prime is 12512214367. The reversal of 12512214321 is 12341221521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12512214321 - 2² = 12512214317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12512214291 and 12512214300.

It is not an unprimeable number, because it can be changed into a prime (12512214721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085369051 + ... + 2085369056.

It is an arithmetic number, because the mean of its divisors is an integer number (4170738108).

Almost surely, 2^12512214321 is an apocalyptic number.

It is an amenable number.

12512214321 is a deficient number, since it is larger than the sum of its proper divisors (4170738111).

12512214321 is an equidigital number, since it uses as much as digits as its factorization.

12512214321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170738110.

The product of its digits is 960, while the sum is 24.

Adding to 12512214321 its reverse (12341221521), we get a palindrome (24853435842).

The spelling of 12512214321 in words is "twelve billion, five hundred twelve million, two hundred fourteen thousand, three hundred twenty-one".