221244424212 has 48 divisors (see below), whose sum is σ = 590037214592. Its totient is φ = 63207112320.

The previous prime is 221244424211. The next prime is 221244424213. The reversal of 221244424212 is 212424442122.

It is an interprime number because it is at equal distance from previous prime (221244424211) and next prime (221244424213).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221244424212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221244424211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892758 + ... + 1113330.

Almost surely, 2^221244424212 is an apocalyptic number.

It is an amenable number.

221244424212 is an abundant number, since it is smaller than the sum of its proper divisors (368792790380).

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

221244424212 is a wasteful number, since it uses less digits than its factorization.

221244424212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232528 (or 232526 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

Adding to 221244424212 its reverse (212424442122), we get a palindrome (433668866334).

The spelling of 221244424212 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred twenty-four thousand, two hundred twelve".