221211012210112 has 112 divisors (see below), whose sum is σ = 456856249973760. Its totient is φ = 106157962137600.

The previous prime is 221211012210101. The next prime is 221211012210193. The reversal of 221211012210112 is 211012210112122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221211012210112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267365448 + ... + 268191544.

It is an arithmetic number, because the mean of its divisors is an integer number (4079073660480).

Almost surely, 2^{221211012210112} 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 221211012210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228428124986880).

221211012210112 is an abundant number, since it is smaller than the sum of its proper divisors (235645237763648).

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

221211012210112 is a wasteful number, since it uses less digits than its factorization.

221211012210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827250 (or 827240 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221211012210112 its reverse (211012210112122), we get a palindrome (432223222322234).

The spelling of 221211012210112 in words is "two hundred twenty-one trillion, two hundred eleven billion, twelve million, two hundred ten thousand, one hundred twelve".