4021444411261 has 2 divisors, whose sum is σ = 4021444411262. Its totient is φ = 4021444411260.

The previous prime is 4021444411219. The next prime is 4021444411297. The reversal of 4021444411261 is 1621144441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3389409871225 + 632034540036 = 1841035^2 + 795006^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444411261 - 2¹⁹ = 4021443886973 is a prime.

It is a super-2 number, since 2×4021444411261² (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 (4021444411211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722205630 + 2010722205631.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722205631).

Almost surely, 2^{4021444411261} is an apocalyptic number.

It is an amenable number.

4021444411261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444411261 is an equidigital number, since it uses as much as digits as its factorization.

4021444411261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 34.

Adding to 4021444411261 its reverse (1621144441204), we get a palindrome (5642588852465).

The spelling of 4021444411261 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred eleven thousand, two hundred sixty-one".