203105213105 has 8 divisors (see below), whose sum is σ = 245087856000. Its totient is φ = 161576436976.

The previous prime is 203105213029. The next prime is 203105213141. The reversal of 203105213105 is 501312501302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203105213105 - 2¹⁰ = 203105212081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113465705 + ... + 113467494.

It is an arithmetic number, because the mean of its divisors is an integer number (30635982000).

Almost surely, 2^203105213105 is an apocalyptic number.

It is an amenable number.

203105213105 is a deficient number, since it is larger than the sum of its proper divisors (41982642895).

203105213105 is a wasteful number, since it uses less digits than its factorization.

203105213105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226933383.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 203105213105 its reverse (501312501302), we get a palindrome (704417714407).

The spelling of 203105213105 in words is "two hundred three billion, one hundred five million, two hundred thirteen thousand, one hundred five".