221301212224 has 28 divisors (see below), whose sum is σ = 439485443100. Its totient is φ = 110564722688.

The previous prime is 221301212183. The next prime is 221301212243. The reversal of 221301212224 is 422212103122.

It can be written as a sum of positive squares in 2 ways, for example, as 135006274624 + 86294937600 = 367432^2 + 293760^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221301212195 and 221301212204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258789 + ... + 1423780.

Almost surely, 2^221301212224 is an apocalyptic number.

It is an amenable number.

221301212224 is a deficient number, since it is larger than the sum of its proper divisors (218184230876).

221301212224 is a wasteful number, since it uses less digits than its factorization.

221301212224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683870 (or 2683860 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221301212224 its reverse (422212103122), we get a palindrome (643513315346).

The spelling of 221301212224 in words is "two hundred twenty-one billion, three hundred one million, two hundred twelve thousand, two hundred twenty-four".