4244001111221 has 2 divisors, whose sum is σ = 4244001111222. Its totient is φ = 4244001111220.

The previous prime is 4244001111193. The next prime is 4244001111277. The reversal of 4244001111221 is 1221111004424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2303033880625 + 1940967230596 = 1517575^2 + 1393186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4244001111221 - 2¹⁰ = 4244001110197 is a prime.

It is a super-2 number, since 2×4244001111221² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4244001116221) 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 as a sum of consecutive naturals, namely, 2122000555610 + 2122000555611.

It is an arithmetic number, because the mean of its divisors is an integer number (2122000555611).

Almost surely, 2^{4244001111221} is an apocalyptic number.

It is an amenable number.

4244001111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4244001111221 is an equidigital number, since it uses as much as digits as its factorization.

4244001111221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 4244001111221 its reverse (1221111004424), we get a palindrome (5465112115645).

The spelling of 4244001111221 in words is "four trillion, two hundred forty-four billion, one million, one hundred eleven thousand, two hundred twenty-one".