221144112405457 has 8 divisors (see below), whose sum is σ = 234349853813856. Its totient is φ = 207960289242432.

The previous prime is 221144112405401. The next prime is 221144112405511. The reversal of 221144112405457 is 754504211441122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221144112405457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221144112405157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5479540563 + ... + 5479580920.

It is an arithmetic number, because the mean of its divisors is an integer number (29293731726732).

Almost surely, 2^{221144112405457} is an apocalyptic number.

It is an amenable number.

221144112405457 is a deficient number, since it is larger than the sum of its proper divisors (13205741408399).

221144112405457 is a wasteful number, since it uses less digits than its factorization.

221144112405457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10959122687.

The product of its (nonzero) digits is 358400, while the sum is 43.

Adding to 221144112405457 its reverse (754504211441122), we get a palindrome (975648323846579).

The spelling of 221144112405457 in words is "two hundred twenty-one trillion, one hundred forty-four billion, one hundred twelve million, four hundred five thousand, four hundred fifty-seven".