401441201081 has 2 divisors, whose sum is σ = 401441201082. Its totient is φ = 401441201080.

The previous prime is 401441201071. The next prime is 401441201099. The reversal of 401441201081 is 180102144104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235046553856 + 166394647225 = 484816^2 + 407915^2 .

It is a cyclic number.

It is not a de Polignac number, because 401441201081 - 2¹⁸ = 401440938937 is a prime.

It is a super-2 number, since 2×401441201081² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401441201081.

It is not a weakly prime, because it can be changed into another prime (401441201071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200720600540 + 200720600541.

It is an arithmetic number, because the mean of its divisors is an integer number (200720600541).

Almost surely, 2^401441201081 is an apocalyptic number.

It is an amenable number.

401441201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

401441201081 is an equidigital number, since it uses as much as digits as its factorization.

401441201081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 401441201081 its reverse (180102144104), we get a palindrome (581543345185).

The spelling of 401441201081 in words is "four hundred one billion, four hundred forty-one million, two hundred one thousand, eighty-one".