12031220212 has 36 divisors (see below), whose sum is σ = 24504050340. Its totient is φ = 5147042560.

The previous prime is 12031220209. The next prime is 12031220231. The reversal of 12031220212 is 21202213021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3843504016 + 8187716196 = 61996^2 + 90486^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722887 + ... + 739342.

It is an arithmetic number, because the mean of its divisors is an integer number (680668065).

Almost surely, 2^12031220212 is an apocalyptic number.

It is an amenable number.

12031220212 is an abundant number, since it is smaller than the sum of its proper divisors (12472830128).

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

12031220212 is a wasteful number, since it uses less digits than its factorization.

12031220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462272 (or 1462259 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12031220212 its reverse (21202213021), we get a palindrome (33233433233).

The spelling of 12031220212 in words is "twelve billion, thirty-one million, two hundred twenty thousand, two hundred twelve".