12012212121102 has 512 divisors, whose sum is σ = 29786132851200. Its totient is φ = 3573625651200.

The previous prime is 12012212121097. The next prime is 12012212121103. The reversal of 12012212121102 is 20112121221021.

12012212121102 is a `hidden beast` number, since 120 + 1 + 221 + 212 + 110 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012212121103) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 49843203702 + ... + 49843203942.

It is an arithmetic number, because the mean of its divisors is an integer number (58176040725).

Almost surely, 2^{12012212121102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12012212121102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14893066425600).

12012212121102 is an abundant number, since it is smaller than the sum of its proper divisors (17773920730098).

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

12012212121102 is a wasteful number, since it uses less digits than its factorization.

12012212121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12012212121102 its reverse (20112121221021), we get a palindrome (32124333342123).

The spelling of 12012212121102 in words is "twelve trillion, twelve billion, two hundred twelve million, one hundred twenty-one thousand, one hundred two".