201210122405 has 4 divisors (see below), whose sum is σ = 241452146892. Its totient is φ = 160968097920.

The previous prime is 201210122389. The next prime is 201210122411. The reversal of 201210122405 is 504221012102.

201210122405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56568341281 + 144641781124 = 237841^2 + 380318^2 .

It is not a de Polignac number, because 201210122405 - 2⁴ = 201210122389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 20121012236 + ... + 20121012245.

It is an arithmetic number, because the mean of its divisors is an integer number (60363036723).

Almost surely, 2^201210122405 is an apocalyptic number.

It is an amenable number.

201210122405 is a deficient number, since it is larger than the sum of its proper divisors (40242024487).

201210122405 is an equidigital number, since it uses as much as digits as its factorization.

201210122405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40242024486.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 201210122405 its reverse (504221012102), we get a palindrome (705431134507).

The spelling of 201210122405 in words is "two hundred one billion, two hundred ten million, one hundred twenty-two thousand, four hundred five".