210221112120 has 64 divisors (see below), whose sum is σ = 637165055520. Its totient is φ = 55481032704.

The previous prime is 210221112109. The next prime is 210221112133. The reversal of 210221112120 is 21211122012.

210221112120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×210221112120³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210221112120.

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 15 ways as a sum of consecutive naturals, for example, 9018477 + ... + 9041756.

Almost surely, 2^210221112120 is an apocalyptic number.

210221112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221112120 is an abundant number, since it is smaller than the sum of its proper divisors (426943943400).

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

210221112120 is a wasteful number, since it uses less digits than its factorization.

210221112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18060344 (or 18060340 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210221112120 its reverse (21211122012), we get a palindrome (231432234132).

The spelling of 210221112120 in words is "two hundred ten billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty".