12020221212 has 48 divisors (see below), whose sum is σ = 29974613760. Its totient is φ = 3735799552.

The previous prime is 12020221211. The next prime is 12020221259. The reversal of 12020221212 is 21212202021.

It is a junction number, because it is equal to n+sod(n) for n = 12020221191 and 12020221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020221211) 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, 253512 + ... + 297167.

It is an arithmetic number, because the mean of its divisors is an integer number (624471120).

Almost surely, 2^12020221212 is an apocalyptic number.

12020221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12020221212 is an abundant number, since it is smaller than the sum of its proper divisors (17954392548).

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

12020221212 is a wasteful number, since it uses less digits than its factorization.

12020221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550810 (or 550808 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12020221212 its reverse (21212202021), we get a palindrome (33232423233).

The spelling of 12020221212 in words is "twelve billion, twenty million, two hundred twenty-one thousand, two hundred twelve".