221220283061 has 2 divisors, whose sum is σ = 221220283062. Its totient is φ = 221220283060.

The previous prime is 221220282989. The next prime is 221220283069. The reversal of 221220283061 is 160382022122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204860338225 + 16359944836 = 452615^2 + 127906^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220283061 - 2¹⁰ = 221220282037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220283069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610141530 + 110610141531.

It is an arithmetic number, because the mean of its divisors is an integer number (110610141531).

Almost surely, 2^221220283061 is an apocalyptic number.

It is an amenable number.

221220283061 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220283061 is an equidigital number, since it uses as much as digits as its factorization.

221220283061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 221220283061 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred eighty-three thousand, sixty-one".