221136218841 has 8 divisors (see below), whose sum is σ = 312192309024. Its totient is φ = 138752137280.

The previous prime is 221136218839. The next prime is 221136218881. The reversal of 221136218841 is 148812631122.

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 221136218841 - 2¹ = 221136218839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221136218841.

It is not an unprimeable number, because it can be changed into a prime (221136218881) 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, 2168002095 + ... + 2168002196.

It is an arithmetic number, because the mean of its divisors is an integer number (39024038628).

Almost surely, 2^221136218841 is an apocalyptic number.

It is an amenable number.

221136218841 is a deficient number, since it is larger than the sum of its proper divisors (91056090183).

221136218841 is a wasteful number, since it uses less digits than its factorization.

221136218841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336004311.

The product of its digits is 36864, while the sum is 39.

Adding to 221136218841 its reverse (148812631122), we get a palindrome (369948849963).

The spelling of 221136218841 in words is "two hundred twenty-one billion, one hundred thirty-six million, two hundred eighteen thousand, eight hundred forty-one".