201226205123 has 2 divisors, whose sum is σ = 201226205124. Its totient is φ = 201226205122.

The previous prime is 201226205107. The next prime is 201226205161. The reversal of 201226205123 is 321502622102.

201226205123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201226205123 - 2⁴ = 201226205107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201226205092 and 201226205101.

It is not a weakly prime, because it can be changed into another prime (201226255123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100613102561 + 100613102562.

It is an arithmetic number, because the mean of its divisors is an integer number (100613102562).

Almost surely, 2^201226205123 is an apocalyptic number.

201226205123 is a deficient number, since it is larger than the sum of its proper divisors (1).

201226205123 is an equidigital number, since it uses as much as digits as its factorization.

201226205123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 201226205123 its reverse (321502622102), we get a palindrome (522728827225).

The spelling of 201226205123 in words is "two hundred one billion, two hundred twenty-six million, two hundred five thousand, one hundred twenty-three".