12212123208 has 64 divisors (see below), whose sum is σ = 31531032000. Its totient is φ = 3938510592.

The previous prime is 12212123197. The next prime is 12212123279. The reversal of 12212123208 is 80232121221.

It is a super-2 number, since 2×12212123208² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120538 + ... + 197366.

It is an arithmetic number, because the mean of its divisors is an integer number (492672375).

Almost surely, 2^12212123208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12212123208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15765516000).

12212123208 is an abundant number, since it is smaller than the sum of its proper divisors (19318908792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212123208 is a wasteful number, since it uses less digits than its factorization.

12212123208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77054 (or 77050 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 12212123208 its reverse (80232121221), we get a palindrome (92444244429).

The spelling of 12212123208 in words is "twelve billion, two hundred twelve million, one hundred twenty-three thousand, two hundred eight".