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12523355321 is a prime number
BaseRepresentation
bin10111010100111001…
…10011110010111001
31012022202220100212212
423222130303302321
5201121434332241
65430402544505
7622224523001
oct135234636271
935282810785
1012523355321
115347120234
122516068135
131247706329
1486b333001
154d469dbeb
hex2ea733cb9

12523355321 has 2 divisors, whose sum is σ = 12523355322. Its totient is φ = 12523355320.

The previous prime is 12523355239. The next prime is 12523355329. The reversal of 12523355321 is 12355332521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7235884096 + 5287471225 = 85064^2 + 72715^2 .

It is a cyclic number.

It is not a de Polignac number, because 12523355321 - 210 = 12523354297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12523355329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6261677660 + 6261677661.

It is an arithmetic number, because the mean of its divisors is an integer number (6261677661).

Almost surely, 212523355321 is an apocalyptic number.

It is an amenable number.

12523355321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12523355321 is an equidigital number, since it uses as much as digits as its factorization.

12523355321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 32.

Adding to 12523355321 its reverse (12355332521), we get a palindrome (24878687842).

The spelling of 12523355321 in words is "twelve billion, five hundred twenty-three million, three hundred fifty-five thousand, three hundred twenty-one".