12120321222 has 32 divisors (see below), whose sum is σ = 26981285760. Its totient is φ = 4033021320.

The previous prime is 12120321221. The next prime is 12120321233. The reversal of 12120321222 is 22212302121.

12120321222 is a `hidden beast` number, since 1 + 2 + 120 + 321 + 222 = 666.

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 = 12120321195 and 12120321204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120321221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165708 + ... + 227375.

It is an arithmetic number, because the mean of its divisors is an integer number (843165180).

Almost surely, 2^12120321222 is an apocalyptic number.

12120321222 is an abundant number, since it is smaller than the sum of its proper divisors (14860964538).

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

12120321222 is a wasteful number, since it uses less digits than its factorization.

12120321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393665 (or 393659 counting only the distinct ones).

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

Adding to 12120321222 its reverse (22212302121), we get a palindrome (34332623343).

The spelling of 12120321222 in words is "twelve billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-two".