244189022221 has 4 divisors (see below), whose sum is σ = 244732873500. Its totient is φ = 243645170944.

The previous prime is 244189022183. The next prime is 244189022237. The reversal of 244189022221 is 122220981442.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82878348996 + 161310673225 = 287886^2 + 401635^2 .

It is a cyclic number.

It is not a de Polignac number, because 244189022221 - 2¹⁵ = 244188989453 is a prime.

It is a pancake number, because a pancake can be divided into 244189022221 parts by 698840 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244189022281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271924966 + ... + 271925863.

It is an arithmetic number, because the mean of its divisors is an integer number (61183218375).

Almost surely, 2^244189022221 is an apocalyptic number.

It is an amenable number.

244189022221 is a deficient number, since it is larger than the sum of its proper divisors (543851279).

244189022221 is an equidigital number, since it uses as much as digits as its factorization.

244189022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543851278.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 244189022221 in words is "two hundred forty-four billion, one hundred eighty-nine million, twenty-two thousand, two hundred twenty-one".