221132313122221 has 8 divisors (see below), whose sum is σ = 222890466544640. Its totient is φ = 219374424607968.

The previous prime is 221132313122213. The next prime is 221132313122267. The reversal of 221132313122221 is 122221313231122.

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

It is a cyclic number.

It is not a de Polignac number, because 221132313122221 - 2³ = 221132313122213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221132313122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221132313122621) 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, 64550736 + ... + 67890073.

It is an arithmetic number, because the mean of its divisors is an integer number (27861308318080).

Almost surely, 2^{221132313122221} is an apocalyptic number.

It is an amenable number.

221132313122221 is a deficient number, since it is larger than the sum of its proper divisors (1758153422419).

221132313122221 is a wasteful number, since it uses less digits than its factorization.

221132313122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132454083.

The product of its digits is 3456, while the sum is 28.

Adding to 221132313122221 its reverse (122221313231122), we get a palindrome (343353626353343).

The spelling of 221132313122221 in words is "two hundred twenty-one trillion, one hundred thirty-two billion, three hundred thirteen million, one hundred twenty-two thousand, two hundred twenty-one".