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1021232213 is a prime number
BaseRepresentation
bin111100110111101…
…100010001010101
32122011121222020022
4330313230101111
54042413412323
6245200314525
734210221251
oct7467542125
92564558208
101021232213
11484505971
12246012a45
13133762421
14998b7261
155e9c74c8
hex3cdec455

1021232213 has 2 divisors, whose sum is σ = 1021232214. Its totient is φ = 1021232212.

The previous prime is 1021232209. The next prime is 1021232231. The reversal of 1021232213 is 3122321201.

Together with next prime (1021232231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019333329 + 1898884 = 31927^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021232213 - 22 = 1021232209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021232191 and 1021232200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021232203) 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, 510616106 + 510616107.

It is an arithmetic number, because the mean of its divisors is an integer number (510616107).

Almost surely, 21021232213 is an apocalyptic number.

It is an amenable number.

1021232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021232213 is an equidigital number, since it uses as much as digits as its factorization.

1021232213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1021232213 is about 31956.7240655234. The cubic root of 1021232213 is about 1007.0278972873.

Adding to 1021232213 its reverse (3122321201), we get a palindrome (4143553414).

The spelling of 1021232213 in words is "one billion, twenty-one million, two hundred thirty-two thousand, two hundred thirteen".