221770954316061 has 64 divisors (see below), whose sum is σ = 357027237888000. Its totient is φ = 135536444925120.

The previous prime is 221770954316059. The next prime is 221770954316083. The reversal of 221770954316061 is 160613459077122.

221770954316061 is a `hidden beast` number, since 2 + 2 + 1 + 7 + 7 + 0 + 95 + 431 + 60 + 61 = 666.

It is not a de Polignac number, because 221770954316061 - 2¹ = 221770954316059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221770954315989 and 221770954316007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221770954314061) 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 63 ways as a sum of consecutive naturals, for example, 194545596 + ... + 195682218.

It is an arithmetic number, because the mean of its divisors is an integer number (5578550592000).

Almost surely, 2^{221770954316061} is an apocalyptic number.

It is an amenable number.

221770954316061 is a deficient number, since it is larger than the sum of its proper divisors (135256283571939).

221770954316061 is a wasteful number, since it uses less digits than its factorization.

221770954316061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148951 (or 1148945 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 221770954316061 in words is "two hundred twenty-one trillion, seven hundred seventy billion, nine hundred fifty-four million, three hundred sixteen thousand, sixty-one".