221002022021161 has 2 divisors, whose sum is σ = 221002022021162. Its totient is φ = 221002022021160.

The previous prime is 221002022021111. The next prime is 221002022021239. The reversal of 221002022021161 is 161120220200122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181080083560000 + 39921938461161 = 13456600^2 + 6318381^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002022021161 - 2⁹ = 221002022020649 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002022021111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501011010580 + 110501011010581.

It is an arithmetic number, because the mean of its divisors is an integer number (110501011010581).

Almost surely, 2^{221002022021161} is an apocalyptic number.

It is an amenable number.

221002022021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002022021161 is an equidigital number, since it uses as much as digits as its factorization.

221002022021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221002022021161 its reverse (161120220200122), we get a palindrome (382122242221283).

The spelling of 221002022021161 in words is "two hundred twenty-one trillion, two billion, twenty-two million, twenty-one thousand, one hundred sixty-one".