221233242321 has 72 divisors (see below), whose sum is σ = 421396859520. Its totient is φ = 110552589504.

The previous prime is 221233242313. The next prime is 221233242341. The reversal of 221233242321 is 123242332122.

221233242321 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 332 + 4 + 2 + 321 = 666.

It is not a de Polignac number, because 221233242321 - 2³ = 221233242313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221233242301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 906585 + ... + 1124438.

It is an arithmetic number, because the mean of its divisors is an integer number (5852734160).

Almost surely, 2^221233242321 is an apocalyptic number.

221233242321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221233242321 is a deficient number, since it is larger than the sum of its proper divisors (200163617199).

221233242321 is a wasteful number, since it uses less digits than its factorization.

221233242321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031075 (or 2031065 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 221233242321 its reverse (123242332122), we get a palindrome (344475574443).

The spelling of 221233242321 in words is "two hundred twenty-one billion, two hundred thirty-three million, two hundred forty-two thousand, three hundred twenty-one".