12312011222 has 8 divisors (see below), whose sum is σ = 21106304976. Its totient is φ = 5276576232.

The previous prime is 12312011221. The next prime is 12312011227. The reversal of 12312011222 is 22211021321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12312011222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312011221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439714673 + ... + 439714700.

It is an arithmetic number, because the mean of its divisors is an integer number (2638288122).

Almost surely, 2^12312011222 is an apocalyptic number.

12312011222 is a deficient number, since it is larger than the sum of its proper divisors (8794293754).

12312011222 is an equidigital number, since it uses as much as digits as its factorization.

12312011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879429382.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12312011222 its reverse (22211021321), we get a palindrome (34523032543).

The spelling of 12312011222 in words is "twelve billion, three hundred twelve million, eleven thousand, two hundred twenty-two".