221741581822 has 4 divisors (see below), whose sum is σ = 332612372736. Its totient is φ = 110870790910.

The previous prime is 221741581799. The next prime is 221741581927. The reversal of 221741581822 is 228185147122.

221741581822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228185147122 = 2 ⋅114092573561.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 55435395454 + ... + 55435395457.

It is an arithmetic number, because the mean of its divisors is an integer number (83153093184).

Almost surely, 2^221741581822 is an apocalyptic number.

221741581822 is a deficient number, since it is larger than the sum of its proper divisors (110870790914).

221741581822 is a wasteful number, since it uses less digits than its factorization.

221741581822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110870790913.

The product of its digits is 143360, while the sum is 43.

The spelling of 221741581822 in words is "two hundred twenty-one billion, seven hundred forty-one million, five hundred eighty-one thousand, eight hundred twenty-two".