203111122123 has 8 divisors (see below), whose sum is σ = 249982919648. Its totient is φ = 160703305344.

The previous prime is 203111122103. The next prime is 203111122157. The reversal of 203111122123 is 321221111302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203111122123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203111122123.

It is not an unprimeable number, because it can be changed into a prime (203111122103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115995086 + ... + 1115995267.

It is an arithmetic number, because the mean of its divisors is an integer number (31247864956).

Almost surely, 2^203111122123 is an apocalyptic number.

203111122123 is a deficient number, since it is larger than the sum of its proper divisors (46871797525).

203111122123 is a wasteful number, since it uses less digits than its factorization.

203111122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231990373.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 203111122123 its reverse (321221111302), we get a palindrome (524332233425).

The spelling of 203111122123 in words is "two hundred three billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-three".