221343330021 has 8 divisors (see below), whose sum is σ = 321953934624. Its totient is φ = 134147472720.

The previous prime is 221343330001. The next prime is 221343330037. The reversal of 221343330021 is 120033343122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-221343330021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221343329973 and 221343330000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221343330001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3353686786 + ... + 3353686851.

It is an arithmetic number, because the mean of its divisors is an integer number (40244241828).

Almost surely, 2^221343330021 is an apocalyptic number.

It is an amenable number.

221343330021 is a deficient number, since it is larger than the sum of its proper divisors (100610604603).

221343330021 is a wasteful number, since it uses less digits than its factorization.

221343330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707373651.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 221343330021 its reverse (120033343122), we get a palindrome (341376673143).

The spelling of 221343330021 in words is "two hundred twenty-one billion, three hundred forty-three million, three hundred thirty thousand, twenty-one".