221235246205 has 16 divisors (see below), whose sum is σ = 266008731264. Its totient is φ = 176637447360.

The previous prime is 221235246191. The next prime is 221235246217. The reversal of 221235246205 is 502642532122.

It is not a de Polignac number, because 221235246205 - 2¹³ = 221235238013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10014582 + ... + 10036648.

It is an arithmetic number, because the mean of its divisors is an integer number (16625545704).

Almost surely, 2^221235246205 is an apocalyptic number.

It is an amenable number.

221235246205 is a deficient number, since it is larger than the sum of its proper divisors (44773485059).

221235246205 is a wasteful number, since it uses less digits than its factorization.

221235246205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25956.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 221235246205 its reverse (502642532122), we get a palindrome (723877778327).

The spelling of 221235246205 in words is "two hundred twenty-one billion, two hundred thirty-five million, two hundred forty-six thousand, two hundred five".