203240512111 has 16 divisors (see below), whose sum is σ = 252111806464. Its totient is φ = 159539484384.

The previous prime is 203240512049. The next prime is 203240512117. The reversal of 203240512111 is 111215042302.

203240512111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203240512111 - 2²¹ = 203238414959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203240512117) 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 15 ways as a sum of consecutive naturals, for example, 8781405 + ... + 8804518.

It is an arithmetic number, because the mean of its divisors is an integer number (15756987904).

Almost surely, 2^203240512111 is an apocalyptic number.

203240512111 is a deficient number, since it is larger than the sum of its proper divisors (48871294353).

203240512111 is a wasteful number, since it uses less digits than its factorization.

203240512111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17586070.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 203240512111 its reverse (111215042302), we get a palindrome (314455554413).

The spelling of 203240512111 in words is "two hundred three billion, two hundred forty million, five hundred twelve thousand, one hundred eleven".