203130122111 has 4 divisors (see below), whose sum is σ = 232148710992. Its totient is φ = 174111533232.

The previous prime is 203130122071. The next prime is 203130122201. The reversal of 203130122111 is 111221031302.

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

It is not a de Polignac number, because 203130122111 - 2¹⁸ = 203129859967 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 203130122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203130122411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14509294430 + ... + 14509294443.

It is an arithmetic number, because the mean of its divisors is an integer number (58037177748).

Almost surely, 2^203130122111 is an apocalyptic number.

203130122111 is a deficient number, since it is larger than the sum of its proper divisors (29018588881).

203130122111 is an equidigital number, since it uses as much as digits as its factorization.

203130122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29018588880.

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

Adding to 203130122111 its reverse (111221031302), we get a palindrome (314351153413).

The spelling of 203130122111 in words is "two hundred three billion, one hundred thirty million, one hundred twenty-two thousand, one hundred eleven".