212121220102110 has 96 divisors (see below), whose sum is σ = 627811737666048. Its totient is φ = 49187529293760.

The previous prime is 212121220102109. The next prime is 212121220102151. The reversal of 212121220102110 is 11201022121212.

212121220102110 is a `hidden beast` number, since 21 + 21 + 212 + 201 + 0 + 211 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4657887202 + ... + 4657932741.

It is an arithmetic number, because the mean of its divisors is an integer number (6539705600688).

Almost surely, 2^{212121220102110} is an apocalyptic number.

212121220102110 is an abundant number, since it is smaller than the sum of its proper divisors (415690517563938).

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

212121220102110 is a wasteful number, since it uses less digits than its factorization.

212121220102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315819990 (or 9315819987 counting only the distinct ones).

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

Adding to 212121220102110 its reverse (11201022121212), we get a palindrome (223322242223322).

The spelling of 212121220102110 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred ten".