201123401 has 2 divisors, whose sum is σ = 201123402. Its totient is φ = 201123400.

The previous prime is 201123397. The next prime is 201123449. The reversal of 201123401 is 104321102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 68873401 = 11500^2 + 8299^2 .

It is a cyclic number.

It is not a de Polignac number, because 201123401 - 2² = 201123397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201123101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561700 + 100561701.

It is an arithmetic number, because the mean of its divisors is an integer number (100561701).

Almost surely, 2^201123401 is an apocalyptic number.

It is an amenable number.

201123401 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123401 is an equidigital number, since it uses as much as digits as its factorization.

201123401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201123401 is about 14181.7982287156. The cubic root of 201123401 is about 585.8964520568.

Adding to 201123401 its reverse (104321102), we get a palindrome (305444503).

The spelling of 201123401 in words is "two hundred one million, one hundred twenty-three thousand, four hundred one".