221657225242341 has 16 divisors (see below), whose sum is σ = 357631825601664. Its totient is φ = 119210608533504.

The previous prime is 221657225242333. The next prime is 221657225242361. The reversal of 221657225242341 is 143242522756122.

It is not a de Polignac number, because 221657225242341 - 2³ = 221657225242333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221657225242361) 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, 310444292700 + ... + 310444293413.

It is an arithmetic number, because the mean of its divisors is an integer number (22351989100104).

Almost surely, 2^{221657225242341} is an apocalyptic number.

221657225242341 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221657225242341 is a deficient number, since it is larger than the sum of its proper divisors (135974600359323).

221657225242341 is a wasteful number, since it uses less digits than its factorization.

221657225242341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620888586140.

The product of its digits is 3225600, while the sum is 48.

Adding to 221657225242341 its reverse (143242522756122), we get a palindrome (364899747998463).

The spelling of 221657225242341 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, two hundred twenty-five million, two hundred forty-two thousand, three hundred forty-one".