12121212202112 has 32 divisors (see below), whose sum is σ = 26005244932380. Its totient is φ = 5594405630976.

The previous prime is 12121212202111. The next prime is 12121212202133. The reversal of 12121212202112 is 21120221212121.

It can be written as a sum of positive squares in 2 ways, for example, as 12022751803456 + 98460398656 = 3467384^2 + 313784^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (12121212202111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3642189503 + ... + 3642192830.

Almost surely, 2^{12121212202112} is an apocalyptic number.

It is an amenable number.

12121212202112 is an abundant number, since it is smaller than the sum of its proper divisors (13884032730268).

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

12121212202112 is an equidigital number, since it uses as much as digits as its factorization.

12121212202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284382360 (or 7284382348 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12121212202112 its reverse (21120221212121), we get a palindrome (33241433414233).

The spelling of 12121212202112 in words is "twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred twelve".