123021307 has 2 divisors, whose sum is σ = 123021308. Its totient is φ = 123021306.

The previous prime is 123021293. The next prime is 123021331. The reversal of 123021307 is 703120321.

It is a weak prime.

It is an emirp because it is prime and its reverse (703120321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123021307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123021377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510653 + 61510654.

It is an arithmetic number, because the mean of its divisors is an integer number (61510654).

Almost surely, 2^123021307 is an apocalyptic number.

123021307 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021307 is an equidigital number, since it uses as much as digits as its factorization.

123021307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 123021307 is about 11091.4970585580. The cubic root of 123021307 is about 497.3476981338.

Adding to 123021307 its reverse (703120321), we get a palindrome (826141628).

The spelling of 123021307 in words is "one hundred twenty-three million, twenty-one thousand, three hundred seven".