12031322220212 has 18 divisors (see below), whose sum is σ = 21373755183522. Its totient is φ = 5925875114544.

The previous prime is 12031322220193. The next prime is 12031322220217. The reversal of 12031322220212 is 21202222313021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10717465252516 + 1313856967696 = 3273754^2 + 1146236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031322220217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 335004383 + ... + 335040294.

It is an arithmetic number, because the mean of its divisors is an integer number (1187430843529).

Almost surely, 2^{12031322220212} is an apocalyptic number.

It is an amenable number.

12031322220212 is a deficient number, since it is larger than the sum of its proper divisors (9342432963310).

12031322220212 is an equidigital number, since it uses as much as digits as its factorization.

12031322220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670044815 (or 670044746 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12031322220212 its reverse (21202222313021), we get a palindrome (33233544533233).

The spelling of 12031322220212 in words is "twelve trillion, thirty-one billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twelve".