12011212212 has 24 divisors (see below), whose sum is σ = 28501183200. Its totient is φ = 3935877216.

The previous prime is 12011212201. The next prime is 12011212217. The reversal of 12011212212 is 21221211021.

It is a junction number, because it is equal to n+sod(n) for n = 12011212191 and 12011212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011212217) 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 7 ways as a sum of consecutive naturals, for example, 8481787 + ... + 8483202.

It is an arithmetic number, because the mean of its divisors is an integer number (1187549300).

Almost surely, 2^12011212212 is an apocalyptic number.

12011212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011212212 is an abundant number, since it is smaller than the sum of its proper divisors (16489970988).

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

12011212212 is a wasteful number, since it uses less digits than its factorization.

12011212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16965055 (or 16965053 counting only the distinct ones).

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

Adding to 12011212212 its reverse (21221211021), we get a palindrome (33232423233).

The spelling of 12011212212 in words is "twelve billion, eleven million, two hundred twelve thousand, two hundred twelve".