221084381749 has 16 divisors (see below), whose sum is σ = 280309501440. Its totient is φ = 169353650160.

The previous prime is 221084381743. The next prime is 221084381779. The reversal of 221084381749 is 947183480122.

It is a cyclic number.

It is not a de Polignac number, because 221084381749 - 2³ = 221084381741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221084381741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24327879 + ... + 24336964.

It is an arithmetic number, because the mean of its divisors is an integer number (17519343840).

Almost surely, 2^221084381749 is an apocalyptic number.

It is an amenable number.

221084381749 is a deficient number, since it is larger than the sum of its proper divisors (59225119691).

221084381749 is a wasteful number, since it uses less digits than its factorization.

221084381749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48664920.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 221084381749 in words is "two hundred twenty-one billion, eighty-four million, three hundred eighty-one thousand, seven hundred forty-nine".