221114371985 has 48 divisors (see below), whose sum is σ = 288794967408. Its totient is φ = 162447667200.

The previous prime is 221114371967. The next prime is 221114372009. The reversal of 221114371985 is 589173411122.

It is a Cunningham number, because it is equal to 470228²+1.

It can be written as a sum of positive squares in 24 ways, for example, as 216947282176 + 4167089809 = 465776^2 + 64553^2 .

It is not a de Polignac number, because 221114371985 - 2¹⁶ = 221114306449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185342549 + ... + 185343741.

It is an arithmetic number, because the mean of its divisors is an integer number (6016561821).

Almost surely, 2^221114371985 is an apocalyptic number.

It is an amenable number.

221114371985 is a deficient number, since it is larger than the sum of its proper divisors (67680595423).

221114371985 is a wasteful number, since it uses less digits than its factorization.

221114371985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 2153 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The spelling of 221114371985 in words is "two hundred twenty-one billion, one hundred fourteen million, three hundred seventy-one thousand, nine hundred eighty-five".