221123405533 has 16 divisors (see below), whose sum is σ = 234743097600. Its totient is φ = 207572472576.

The previous prime is 221123405527. The next prime is 221123405593. The reversal of 221123405533 is 335504321122.

It is a cyclic number.

It is not a de Polignac number, because 221123405533 - 2⁵ = 221123405501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221123405495 and 221123405504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221123405593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10724368 + ... + 10744966.

It is an arithmetic number, because the mean of its divisors is an integer number (14671443600).

Almost surely, 2^221123405533 is an apocalyptic number.

It is an amenable number.

221123405533 is a deficient number, since it is larger than the sum of its proper divisors (13619692067).

221123405533 is a wasteful number, since it uses less digits than its factorization.

221123405533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22236.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 221123405533 its reverse (335504321122), we get a palindrome (556627726655).

The spelling of 221123405533 in words is "two hundred twenty-one billion, one hundred twenty-three million, four hundred five thousand, five hundred thirty-three".