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1323121213 is a prime number
BaseRepresentation
bin100111011011101…
…0011101000111101
310102012200112002101
41032313103220331
510202204334323
6335143025101
744534226151
oct11667235075
93365615071
101323121213
1161995a607
1230b13b191
13181171c7b
14c7a1d061
157b25adad
hex4edd3a3d

1323121213 has 2 divisors, whose sum is σ = 1323121214. Its totient is φ = 1323121212.

The previous prime is 1323121193. The next prime is 1323121229. The reversal of 1323121213 is 3121213231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1258688484 + 64432729 = 35478^2 + 8027^2 .

It is an emirp because it is prime and its reverse (3121213231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323121213 - 213 = 1323113021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323121273) 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, 661560606 + 661560607.

It is an arithmetic number, because the mean of its divisors is an integer number (661560607).

Almost surely, 21323121213 is an apocalyptic number.

It is an amenable number.

1323121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323121213 is an equidigital number, since it uses as much as digits as its factorization.

1323121213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1323121213 is about 36374.7331674062. The cubic root of 1323121213 is about 1097.8252384700.

Adding to 1323121213 its reverse (3121213231), we get a palindrome (4444334444).

The spelling of 1323121213 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred thirteen".