5621274716221 has 2 divisors, whose sum is σ = 5621274716222. Its totient is φ = 5621274716220.

The previous prime is 5621274716201. The next prime is 5621274716243. The reversal of 5621274716221 is 1226174721265.

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., 4986088032025 + 635186684196 = 2232955^2 + 796986^2 .

It is a cyclic number.

It is not a de Polignac number, because 5621274716221 - 2⁷ = 5621274716093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5621274716201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2810637358110 + 2810637358111.

It is an arithmetic number, because the mean of its divisors is an integer number (2810637358111).

Almost surely, 2^{5621274716221} is an apocalyptic number.

It is an amenable number.

5621274716221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5621274716221 is an equidigital number, since it uses as much as digits as its factorization.

5621274716221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The spelling of 5621274716221 in words is "five trillion, six hundred twenty-one billion, two hundred seventy-four million, seven hundred sixteen thousand, two hundred twenty-one".