212121121212102 has 64 divisors (see below), whose sum is σ = 445728137057280. Its totient is φ = 67221903302400.

The previous prime is 212121121212017. The next prime is 212121121212137. The reversal of 212121121212102 is 201212121121212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18704277 + ... + 27822512.

It is an arithmetic number, because the mean of its divisors is an integer number (6964502141520).

Almost surely, 2^{212121121212102} is an apocalyptic number.

212121121212102 is an abundant number, since it is smaller than the sum of its proper divisors (233607015845178).

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

212121121212102 is a wasteful number, since it uses less digits than its factorization.

212121121212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46527309.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212121121212102 its reverse (201212121121212), we get a palindrome (413333242333314).

The spelling of 212121121212102 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred two".