201223203913 has 2 divisors, whose sum is σ = 201223203914. Its totient is φ = 201223203912.

The previous prime is 201223203887. The next prime is 201223203931. The reversal of 201223203913 is 319302322102.

Together with next prime (201223203931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191636444169 + 9586759744 = 437763^2 + 97912^2 .

It is a cyclic number.

It is not a de Polignac number, because 201223203913 - 2¹³ = 201223195721 is a prime.

It is not a weakly prime, because it can be changed into another prime (201223203953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100611601956 + 100611601957.

It is an arithmetic number, because the mean of its divisors is an integer number (100611601957).

Almost surely, 2^201223203913 is an apocalyptic number.

It is an amenable number.

201223203913 is a deficient number, since it is larger than the sum of its proper divisors (1).

201223203913 is an equidigital number, since it uses as much as digits as its factorization.

201223203913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 201223203913 in words is "two hundred one billion, two hundred twenty-three million, two hundred three thousand, nine hundred thirteen".