210221202112 has 56 divisors (see below), whose sum is σ = 421816930304. Its totient is φ = 103942040832.

The previous prime is 210221202013. The next prime is 210221202179. The reversal of 210221202112 is 211202122012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453173 + ... + 2537419.

It is an arithmetic number, because the mean of its divisors is an integer number (7532445184).

Almost surely, 2^210221202112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210221202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210908465152).

210221202112 is an abundant number, since it is smaller than the sum of its proper divisors (211595728192).

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

210221202112 is a wasteful number, since it uses less digits than its factorization.

210221202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84693 (or 84683 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210221202112 its reverse (211202122012), we get a palindrome (421423324124).

The spelling of 210221202112 in words is "two hundred ten billion, two hundred twenty-one million, two hundred two thousand, one hundred twelve".