212121102220110 has 48 divisors (see below), whose sum is σ = 551516424011280. Its totient is φ = 56565467439360.

The previous prime is 212121102220067. The next prime is 212121102220169. The reversal of 212121102220110 is 11022201121212.

212121102220110 is a `hidden beast` number, since 2 + 121 + 211 + 0 + 2 + 220 + 110 = 666.

It is a super-3 number, since 3×212121102220110³ (a number of 44 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 30613270 + ... + 36897350.

It is an arithmetic number, because the mean of its divisors is an integer number (11489925500235).

Almost surely, 2^{212121102220110} is an apocalyptic number.

212121102220110 is an abundant number, since it is smaller than the sum of its proper divisors (339395321791170).

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

212121102220110 is a wasteful number, since it uses less digits than its factorization.

212121102220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659153 (or 6659150 counting only the distinct ones).

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

Adding to 212121102220110 its reverse (11022201121212), we get a palindrome (223143303341322).

The spelling of 212121102220110 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty thousand, one hundred ten".