203101213123 has 4 divisors (see below), whose sum is σ = 203104373440. Its totient is φ = 203098052808.

The previous prime is 203101213109. The next prime is 203101213163. The reversal of 203101213123 is 321312101302.

203101213123 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203101213123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203101213123.

It is not an unprimeable number, because it can be changed into a prime (203101213163) 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 in 3 ways as a sum of consecutive naturals, for example, 1481715 + ... + 1612972.

It is an arithmetic number, because the mean of its divisors is an integer number (50776093360).

Almost surely, 2^203101213123 is an apocalyptic number.

203101213123 is a deficient number, since it is larger than the sum of its proper divisors (3160317).

203101213123 is an equidigital number, since it uses as much as digits as its factorization.

203101213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160316.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203101213123 its reverse (321312101302), we get a palindrome (524413314425).

The spelling of 203101213123 in words is "two hundred three billion, one hundred one million, two hundred thirteen thousand, one hundred twenty-three".