12437321522 has 4 divisors (see below), whose sum is σ = 18655982286. Its totient is φ = 6218660760.

The previous prime is 12437321509. The next prime is 12437321527. The reversal of 12437321522 is 22512373421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12347432161 + 89889361 = 111119^2 + 9481^2 .

It is not an unprimeable number, because it can be changed into a prime (12437321527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3109330379 + ... + 3109330382.

Almost surely, 2^12437321522 is an apocalyptic number.

12437321522 is a deficient number, since it is larger than the sum of its proper divisors (6218660764).

12437321522 is an equidigital number, since it uses as much as digits as its factorization.

12437321522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218660763.

The product of its digits is 20160, while the sum is 32.

Adding to 12437321522 its reverse (22512373421), we get a palindrome (34949694943).

The spelling of 12437321522 in words is "twelve billion, four hundred thirty-seven million, three hundred twenty-one thousand, five hundred twenty-two".