212121110210120 has 64 divisors (see below), whose sum is σ = 477373075845120. Its totient is φ = 84830565705984.

The previous prime is 212121110210077. The next prime is 212121110210143. The reversal of 212121110210120 is 21012011121212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4823872454 + ... + 4823916426.

It is an arithmetic number, because the mean of its divisors is an integer number (7458954310080).

Almost surely, 2^{212121110210120} is an apocalyptic number.

212121110210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121110210120 is an abundant number, since it is smaller than the sum of its proper divisors (265251965635000).

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

212121110210120 is a wasteful number, since it uses less digits than its factorization.

212121110210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66654 (or 66650 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212121110210120 its reverse (21012011121212), we get a palindrome (233133121331332).

The spelling of 212121110210120 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred ten million, two hundred ten thousand, one hundred twenty".