221212102110 has 64 divisors (see below), whose sum is σ = 541362092544. Its totient is φ = 57837628800.

The previous prime is 221212102099. The next prime is 221212102121. The reversal of 221212102110 is 11201212122.

221212102110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221212102099) and next prime (221212102121).

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 221212102110.

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 31 ways as a sum of consecutive naturals, for example, 98637 + ... + 672423.

It is an arithmetic number, because the mean of its divisors is an integer number (8458782696).

Almost surely, 2^221212102110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221212102110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270681046272).

221212102110 is an abundant number, since it is smaller than the sum of its proper divisors (320149990434).

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

221212102110 is a wasteful number, since it uses less digits than its factorization.

221212102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574049.

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

Adding to 221212102110 its reverse (11201212122), we get a palindrome (232413314232).

The spelling of 221212102110 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred two thousand, one hundred ten".