203102102030111 has 4 divisors (see below), whose sum is σ = 210105622789800. Its totient is φ = 196098581270424.

The previous prime is 203102102030033. The next prime is 203102102030117. The reversal of 203102102030111 is 111030201201302.

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-203102102030111 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 203102102030111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203102102030117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3501760379801 + ... + 3501760379858.

It is an arithmetic number, because the mean of its divisors is an integer number (52526405697450).

Almost surely, 2^{203102102030111} is an apocalyptic number.

203102102030111 is a deficient number, since it is larger than the sum of its proper divisors (7003520759689).

203102102030111 is an equidigital number, since it uses as much as digits as its factorization.

203102102030111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003520759688.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 203102102030111 its reverse (111030201201302), we get a palindrome (314132303231413).

The spelling of 203102102030111 in words is "two hundred three trillion, one hundred two billion, one hundred two million, thirty thousand, one hundred eleven".