12546223322 has 4 divisors (see below), whose sum is σ = 18819334986. Its totient is φ = 6273111660.

The previous prime is 12546223297. The next prime is 12546223337. The reversal of 12546223322 is 22332264521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22332264521 = 7 ⋅3190323503.

It can be written as a sum of positive squares in only one way, i.e., 8146687081 + 4399536241 = 90259^2 + 66329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3136555829 + ... + 3136555832.

Almost surely, 2^12546223322 is an apocalyptic number.

12546223322 is a deficient number, since it is larger than the sum of its proper divisors (6273111664).

12546223322 is an equidigital number, since it uses as much as digits as its factorization.

12546223322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273111663.

The product of its digits is 34560, while the sum is 32.

Adding to 12546223322 its reverse (22332264521), we get a palindrome (34878487843).

The spelling of 12546223322 in words is "twelve billion, five hundred forty-six million, two hundred twenty-three thousand, three hundred twenty-two".