4342227556621 has 2 divisors, whose sum is σ = 4342227556622. Its totient is φ = 4342227556620.

The previous prime is 4342227556609. The next prime is 4342227556651. The reversal of 4342227556621 is 1266557222434.

4342227556621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3680834102500 + 661393454121 = 1918550^2 + 813261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4342227556621 - 2²¹ = 4342225459469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4342227556651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171113778310 + 2171113778311.

It is an arithmetic number, because the mean of its divisors is an integer number (2171113778311).

Almost surely, 2^{4342227556621} is an apocalyptic number.

It is an amenable number.

4342227556621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4342227556621 is an equidigital number, since it uses as much as digits as its factorization.

4342227556621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 49.

The spelling of 4342227556621 in words is "four trillion, three hundred forty-two billion, two hundred twenty-seven million, five hundred fifty-six thousand, six hundred twenty-one".