221244212024 has 64 divisors (see below), whose sum is σ = 454302535680. Its totient is φ = 100175680000.

The previous prime is 221244211997. The next prime is 221244212099. The reversal of 221244212024 is 420212442122.

It is a junction number, because it is equal to n+sod(n) for n = 221244211984 and 221244212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29689499 + ... + 29696949.

It is an arithmetic number, because the mean of its divisors is an integer number (7098477120).

Almost surely, 2^221244212024 is an apocalyptic number.

It is an amenable number.

221244212024 is an abundant number, since it is smaller than the sum of its proper divisors (233058323656).

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

221244212024 is a wasteful number, since it uses less digits than its factorization.

221244212024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732 (or 8728 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 221244212024 its reverse (420212442122), we get a palindrome (641456654146).

The spelling of 221244212024 in words is "two hundred twenty-one billion, two hundred forty-four million, two hundred twelve thousand, twenty-four".