Search a number
-
+
221021211211 is a prime number
BaseRepresentation
bin1100110111010111100…
…1000000101001001011
3210010111100101212011121
43031311321000221023
512110122412224321
6245311415340111
721653053204033
oct3156571005113
9703440355147
10221021211211
1185809791329
1236a03681637
1317ac444c7a8
14a9a9c768c3
155b38bb1441
hex3375e40a4b

221021211211 has 2 divisors, whose sum is σ = 221021211212. Its totient is φ = 221021211210.

The previous prime is 221021211161. The next prime is 221021211227. The reversal of 221021211211 is 112112120122.

221021211211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (221021211227) can be obtained adding 221021211211 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221021211211 - 223 = 221012822603 is a prime.

It is not a weakly prime, because it can be changed into another prime (221021211011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510605605 + 110510605606.

It is an arithmetic number, because the mean of its divisors is an integer number (110510605606).

Almost surely, 2221021211211 is an apocalyptic number.

221021211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021211211 is an equidigital number, since it uses as much as digits as its factorization.

221021211211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221021211211 its reverse (112112120122), we get a palindrome (333133331333).

The spelling of 221021211211 in words is "two hundred twenty-one billion, twenty-one million, two hundred eleven thousand, two hundred eleven".