12122323216 has 10 divisors (see below), whose sum is σ = 23487001262. Its totient is φ = 6061161600.

The previous prime is 12122323201. The next prime is 12122323217. The reversal of 12122323216 is 61232322121.

It can be written as a sum of positive squares in only one way, i.e., 11385743616 + 736579600 = 106704^2 + 27140^2 .

It is not an unprimeable number, because it can be changed into a prime (12122323217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378822585 + ... + 378822616.

Almost surely, 2^12122323216 is an apocalyptic number.

12122323216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12122323216 is a deficient number, since it is larger than the sum of its proper divisors (11364678046).

12122323216 is an equidigital number, since it uses as much as digits as its factorization.

12122323216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757645209 (or 757645203 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 12122323216 its reverse (61232322121), we get a palindrome (73354645337).

The spelling of 12122323216 in words is "twelve billion, one hundred twenty-two million, three hundred twenty-three thousand, two hundred sixteen".