201320123 has 2 divisors, whose sum is σ = 201320124. Its totient is φ = 201320122.

The previous prime is 201320111. The next prime is 201320149. The reversal of 201320123 is 321023102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201320123 - 2¹⁰ = 201319099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201320098 and 201320107.

It is not a weakly prime, because it can be changed into another prime (201320183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660061 + 100660062.

It is an arithmetic number, because the mean of its divisors is an integer number (100660062).

Almost surely, 2^201320123 is an apocalyptic number.

201320123 is a deficient number, since it is larger than the sum of its proper divisors (1).

201320123 is an equidigital number, since it uses as much as digits as its factorization.

201320123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 201320123 is about 14188.7322548563. The cubic root of 201320123 is about 586.0874146912.

Adding to 201320123 its reverse (321023102), we get a palindrome (522343225).

The spelling of 201320123 in words is "two hundred one million, three hundred twenty thousand, one hundred twenty-three".