12201231222 has 96 divisors (see below), whose sum is σ = 28403751168. Its totient is φ = 3775387968.

The previous prime is 12201231173. The next prime is 12201231247. The reversal of 12201231222 is 22213210221.

12201231222 is a `hidden beast` number, since 12 + 201 + 231 + 222 = 666.

It is a super-2 number, since 2×12201231222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12201231195 and 12201231204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8010553 + ... + 8012075.

It is an arithmetic number, because the mean of its divisors is an integer number (295872408).

Almost surely, 2^12201231222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201231222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14201875584).

12201231222 is an abundant number, since it is smaller than the sum of its proper divisors (16202519946).

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

12201231222 is a wasteful number, since it uses less digits than its factorization.

12201231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12201231222 its reverse (22213210221), we get a palindrome (34414441443).

The spelling of 12201231222 in words is "twelve billion, two hundred one million, two hundred thirty-one thousand, two hundred twenty-two".