201043103123 has 4 divisors (see below), whose sum is σ = 201758559288. Its totient is φ = 200327646960.

The previous prime is 201043103111. The next prime is 201043103137. The reversal of 201043103123 is 321301340102.

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 201043103123 - 2⁸ = 201043102867 is a prime.

It is a super-3 number, since 3×201043103123³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201043103095 and 201043103104.

It is not an unprimeable number, because it can be changed into a prime (201043106123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357727661 + ... + 357728222.

It is an arithmetic number, because the mean of its divisors is an integer number (50439639822).

Almost surely, 2^201043103123 is an apocalyptic number.

201043103123 is a deficient number, since it is larger than the sum of its proper divisors (715456165).

201043103123 is an equidigital number, since it uses as much as digits as its factorization.

201043103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715456164.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 201043103123 its reverse (321301340102), we get a palindrome (522344443225).

The spelling of 201043103123 in words is "two hundred one billion, forty-three million, one hundred three thousand, one hundred twenty-three".