4021444330261 has 2 divisors, whose sum is σ = 4021444330262. Its totient is φ = 4021444330260.

The previous prime is 4021444330223. The next prime is 4021444330291. The reversal of 4021444330261 is 1620334441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3825975120100 + 195469210161 = 1956010^2 + 442119^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444330261 - 2¹⁷ = 4021444199189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021444330291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722165130 + 2010722165131.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722165131).

Almost surely, 2^{4021444330261} is an apocalyptic number.

It is an amenable number.

4021444330261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444330261 is an equidigital number, since it uses as much as digits as its factorization.

4021444330261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 4021444330261 its reverse (1620334441204), we get a palindrome (5641778771465).

The spelling of 4021444330261 in words is "four trillion, twenty-one billion, four hundred forty-four million, three hundred thirty thousand, two hundred sixty-one".