2221112221865 has 8 divisors (see below), whose sum is σ = 2665348769160. Its totient is φ = 1776880375552.

The previous prime is 2221112221859. The next prime is 2221112221877. The reversal of 2221112221865 is 5681222111222.

It can be written as a sum of positive squares in 4 ways, for example, as 94406249536 + 2126705972329 = 307256^2 + 1458323^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2221112221865 - 2¹² = 2221112217769 is a prime.

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, 35264 + ... + 2107953.

It is an arithmetic number, because the mean of its divisors is an integer number (333168596145).

Almost surely, 2^{2221112221865} is an apocalyptic number.

It is an amenable number.

2221112221865 is a deficient number, since it is larger than the sum of its proper divisors (444236547295).

2221112221865 is a wasteful number, since it uses less digits than its factorization.

2221112221865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350491.

The product of its digits is 15360, while the sum is 35.

The spelling of 2221112221865 in words is "two trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, eight hundred sixty-five".