221122110021985 has 8 divisors (see below), whose sum is σ = 266210852979456. Its totient is φ = 176321474048880.

The previous prime is 221122110021959. The next prime is 221122110022031. The reversal of 221122110021985 is 589120011221122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221122110021985 - 2¹⁹ = 221122109497697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72026744401 + ... + 72026747470.

It is an arithmetic number, because the mean of its divisors is an integer number (33276356622432).

Almost surely, 2^{221122110021985} is an apocalyptic number.

It is an amenable number.

221122110021985 is a deficient number, since it is larger than the sum of its proper divisors (45088742957471).

221122110021985 is a wasteful number, since it uses less digits than its factorization.

221122110021985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144053492183.

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 221122110021985 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred ten million, twenty-one thousand, nine hundred eighty-five".