411244021 has 2 divisors, whose sum is σ = 411244022. Its totient is φ = 411244020.

The previous prime is 411244019. The next prime is 411244033. The reversal of 411244021 is 120442114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320803921 + 90440100 = 17911^2 + 9510^2 .

It is a cyclic number.

It is not a de Polignac number, because 411244021 - 2¹ = 411244019 is a prime.

Together with 411244019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 411244021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411244051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205622010 + 205622011.

It is an arithmetic number, because the mean of its divisors is an integer number (205622011).

Almost surely, 2^411244021 is an apocalyptic number.

It is an amenable number.

411244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

411244021 is an equidigital number, since it uses as much as digits as its factorization.

411244021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 411244021 is about 20279.1523738050. The cubic root of 411244021 is about 743.6464897871.

Adding to 411244021 its reverse (120442114), we get a palindrome (531686135).

The spelling of 411244021 in words is "four hundred eleven million, two hundred forty-four thousand, twenty-one".