221020000027 has 2 divisors, whose sum is σ = 221020000028. Its totient is φ = 221020000026.

The previous prime is 221020000013. The next prime is 221020000073. The reversal of 221020000027 is 720000020122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020000027 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020000087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510000013 + 110510000014.

It is an arithmetic number, because the mean of its divisors is an integer number (110510000014).

Almost surely, 2^221020000027 is an apocalyptic number.

221020000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020000027 is an equidigital number, since it uses as much as digits as its factorization.

221020000027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

Adding to 221020000027 its reverse (720000020122), we get a palindrome (941020020149).

The spelling of 221020000027 in words is "two hundred twenty-one billion, twenty million, twenty-seven", and thus it is an aban number.