212121212121102 has 16 divisors (see below), whose sum is σ = 437927663734272. Its totient is φ = 68426197458360.

The previous prime is 212121212121089. The next prime is 212121212121103. The reversal of 212121212121102 is 201121212121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121212121103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570218311968 + ... + 570218312339.

It is an arithmetic number, because the mean of its divisors is an integer number (27370478983392).

Almost surely, 2^{212121212121102} is an apocalyptic number.

212121212121102 is an abundant number, since it is smaller than the sum of its proper divisors (225806451613170).

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

212121212121102 is a wasteful number, since it uses less digits than its factorization.

212121212121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140436624343.

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

Adding to 212121212121102 its reverse (201121212121212), we get a palindrome (413242424242314).

The spelling of 212121212121102 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, one hundred two".