12121212220002 has 32 divisors (see below), whose sum is σ = 26936667393600. Its totient is φ = 4040308037664.

The previous prime is 12121212219971. The next prime is 12121212220009. The reversal of 12121212220002 is 20002221212121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (12121212220009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356368 + ... + 4936539.

It is an arithmetic number, because the mean of its divisors is an integer number (841770856050).

Almost surely, 2^{12121212220002} is an apocalyptic number.

12121212220002 is an abundant number, since it is smaller than the sum of its proper divisors (14815455173598).

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

12121212220002 is a wasteful number, since it uses less digits than its factorization.

12121212220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335327 (or 5335321 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12121212220002 its reverse (20002221212121), we get a palindrome (32123433432123).

The spelling of 12121212220002 in words is "twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, two".