5641401221 has 2 divisors, whose sum is σ = 5641401222. Its totient is φ = 5641401220.

The previous prime is 5641401203. The next prime is 5641401247. The reversal of 5641401221 is 1221041465.

It is an a-pointer prime, because the next prime (5641401247) can be obtained adding 5641401221 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4687456225 + 953944996 = 68465^2 + 30886^2 .

It is a cyclic number.

It is not a de Polignac number, because 5641401221 - 2²² = 5637206917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5641401281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820700610 + 2820700611.

It is an arithmetic number, because the mean of its divisors is an integer number (2820700611).

Almost surely, 2^5641401221 is an apocalyptic number.

It is an amenable number.

5641401221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5641401221 is an equidigital number, since it uses as much as digits as its factorization.

5641401221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 5641401221 is about 75109.2618856024. The cubic root of 5641401221 is about 1780.1734903281.

Adding to 5641401221 its reverse (1221041465), we get a palindrome (6862442686).

The spelling of 5641401221 in words is "five billion, six hundred forty-one million, four hundred one thousand, two hundred twenty-one".