203453411123 has 4 divisors (see below), whose sum is σ = 203455010880. Its totient is φ = 203451811368.

The previous prime is 203453411113. The next prime is 203453411129. The reversal of 203453411123 is 321114354302.

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

It is a cyclic number.

It is not a de Polignac number, because 203453411123 - 2⁶ = 203453411059 is a prime.

It is a super-2 number, since 2×203453411123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203453411129) 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, 590915 + ... + 869532.

It is an arithmetic number, because the mean of its divisors is an integer number (50863752720).

Almost surely, 2^203453411123 is an apocalyptic number.

203453411123 is a deficient number, since it is larger than the sum of its proper divisors (1599757).

203453411123 is a wasteful number, since it uses less digits than its factorization.

203453411123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599756.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 203453411123 its reverse (321114354302), we get a palindrome (524567765425).

The spelling of 203453411123 in words is "two hundred three billion, four hundred fifty-three million, four hundred eleven thousand, one hundred twenty-three".