4021441311161 has 2 divisors, whose sum is σ = 4021441311162. Its totient is φ = 4021441311160.

The previous prime is 4021441311133. The next prime is 4021441311197. The reversal of 4021441311161 is 1611131441204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3860218985536 + 161222325625 = 1964744^2 + 401525^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021441311161 - 2³⁴ = 4004261441977 is a prime.

It is a super-2 number, since 2×4021441311161² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4021441311101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010720655580 + 2010720655581.

It is an arithmetic number, because the mean of its divisors is an integer number (2010720655581).

Almost surely, 2^{4021441311161} is an apocalyptic number.

It is an amenable number.

4021441311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021441311161 is an equidigital number, since it uses as much as digits as its factorization.

4021441311161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

Adding to 4021441311161 its reverse (1611131441204), we get a palindrome (5632572752365).

The spelling of 4021441311161 in words is "four trillion, twenty-one billion, four hundred forty-one million, three hundred eleven thousand, one hundred sixty-one".