12012221332 has 12 divisors (see below), whose sum is σ = 21022878996. Its totient is φ = 6005684480.

The previous prime is 12012221317. The next prime is 12012221383. The reversal of 12012221332 is 23312221021.

It can be written as a sum of positive squares in 2 ways, for example, as 6279611536 + 5732609796 = 79244^2 + 75714^2 .

It is a super-2 number, since 2×12012221332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38269 + ... + 159652.

It is an arithmetic number, because the mean of its divisors is an integer number (1751906583).

Almost surely, 2^12012221332 is an apocalyptic number.

It is an amenable number.

12012221332 is a deficient number, since it is larger than the sum of its proper divisors (9010657664).

12012221332 is a wasteful number, since it uses less digits than its factorization.

12012221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213098 (or 213096 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12012221332 its reverse (23312221021), we get a palindrome (35324442353).

The spelling of 12012221332 in words is "twelve billion, twelve million, two hundred twenty-one thousand, three hundred thirty-two".