221656361271044 has 96 divisors (see below), whose sum is σ = 471360610296576. Its totient is φ = 89032278712320.

The previous prime is 221656361271031. The next prime is 221656361271101. The reversal of 221656361271044 is 440172163656122.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 221656361270983 and 221656361271001.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3456705167 + ... + 3456769289.

It is an arithmetic number, because the mean of its divisors is an integer number (4910006357256).

Almost surely, 2^{221656361271044} 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 221656361271044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235680305148288).

221656361271044 is an abundant number, since it is smaller than the sum of its proper divisors (249704249025532).

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

221656361271044 is a wasteful number, since it uses less digits than its factorization.

221656361271044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94525 (or 94523 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 221656361271044 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, three hundred sixty-one million, two hundred seventy-one thousand, forty-four".