411111421440221 has 4 divisors (see below), whose sum is σ = 418868240712732. Its totient is φ = 403354602167712.

The previous prime is 411111421440211. The next prime is 411111421440227. The reversal of 411111421440221 is 122044124111114.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161665376152900 + 249446045287321 = 12714770^2 + 15793861^2 .

It is a cyclic number.

It is not a de Polignac number, because 411111421440221 - 2¹⁴ = 411111421423837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411111421440227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3878409636176 + ... + 3878409636281.

It is an arithmetic number, because the mean of its divisors is an integer number (104717060178183).

Almost surely, 2^{411111421440221} is an apocalyptic number.

It is an amenable number.

411111421440221 is a deficient number, since it is larger than the sum of its proper divisors (7756819272511).

411111421440221 is an equidigital number, since it uses as much as digits as its factorization.

411111421440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7756819272510.

The product of its (nonzero) digits is 2048, while the sum is 29.

Adding to 411111421440221 its reverse (122044124111114), we get a palindrome (533155545551335).

The spelling of 411111421440221 in words is "four hundred eleven trillion, one hundred eleven billion, four hundred twenty-one million, four hundred forty thousand, two hundred twenty-one".