221204214243 has 24 divisors (see below), whose sum is σ = 320712437760. Its totient is φ = 146918813040.

The previous prime is 221204214233. The next prime is 221204214269. The reversal of 221204214243 is 342412402122.

It is a happy number.

221204214243 is a `hidden beast` number, since 2 + 2 + 1 + 204 + 214 + 243 = 666.

It is not a de Polignac number, because 221204214243 - 2¹³ = 221204206051 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (221204214233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2689630 + ... + 2770652.

It is an arithmetic number, because the mean of its divisors is an integer number (13363018240).

Almost surely, 2^221204214243 is an apocalyptic number.

221204214243 is a deficient number, since it is larger than the sum of its proper divisors (99508223517).

221204214243 is a wasteful number, since it uses less digits than its factorization.

221204214243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82159 (or 82156 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 221204214243 its reverse (342412402122), we get a palindrome (563616616365).

The spelling of 221204214243 in words is "two hundred twenty-one billion, two hundred four million, two hundred fourteen thousand, two hundred forty-three".