123100321 has 2 divisors, whose sum is σ = 123100322. Its totient is φ = 123100320.

The previous prime is 123100309. The next prime is 123100333. The reversal of 123100321 is 123001321.

It is a balanced prime because it is at equal distance from previous prime (123100309) and next prime (123100333).

It can be written as a sum of positive squares in only one way, i.e., 123099025 + 1296 = 11095^2 + 36^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123100321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121100321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61550160 + 61550161.

It is an arithmetic number, because the mean of its divisors is an integer number (61550161).

Almost surely, 2^123100321 is an apocalyptic number.

It is an amenable number.

123100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123100321 is an equidigital number, since it uses as much as digits as its factorization.

123100321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123100321 is about 11095.0584045331. The cubic root of 123100321 is about 497.4541540036.

Adding to 123100321 its reverse (123001321), we get a palindrome (246101642).

The spelling of 123100321 in words is "one hundred twenty-three million, one hundred thousand, three hundred twenty-one".