12120221112 has 64 divisors (see below), whose sum is σ = 30489000480. Its totient is φ = 4015030272.

The previous prime is 12120221039. The next prime is 12120221117. The reversal of 12120221112 is 21112202121.

It is a junction number, because it is equal to n+sod(n) for n = 12120221091 and 12120221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120221117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2683368 + ... + 2687880.

Almost surely, 2^12120221112 is an apocalyptic number.

12120221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120221112 is an abundant number, since it is smaller than the sum of its proper divisors (18368779368).

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

12120221112 is a wasteful number, since it uses less digits than its factorization.

12120221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5192 (or 5188 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12120221112 its reverse (21112202121), we get a palindrome (33232423233).

The spelling of 12120221112 in words is "twelve billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twelve".