221749124202056 has 128 divisors (see below), whose sum is σ = 471971196195840. Its totient is φ = 96788486995200.

The previous prime is 221749124202037. The next prime is 221749124202079. The reversal of 221749124202056 is 650202421947122.

It is a self number, because there is not a number n which added to its sum of digits gives 221749124202056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 462100661 + ... + 462580283.

It is an arithmetic number, because the mean of its divisors is an integer number (3687274970280).

Almost surely, 2^{221749124202056} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221749124202056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235985598097920).

221749124202056 is an abundant number, since it is smaller than the sum of its proper divisors (250222071993784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221749124202056 is a wasteful number, since it uses less digits than its factorization.

221749124202056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481747 (or 481743 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 221749124202056 in words is "two hundred twenty-one trillion, seven hundred forty-nine billion, one hundred twenty-four million, two hundred two thousand, fifty-six".