203112200121 has 4 divisors (see below), whose sum is σ = 270816266832. Its totient is φ = 135408133412.

The previous prime is 203112200113. The next prime is 203112200149. The reversal of 203112200121 is 121002211302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203112200121 - 2³ = 203112200113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203112200121.

It is not an unprimeable number, because it can be changed into a prime (203112200821) 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, 33852033351 + ... + 33852033356.

It is an arithmetic number, because the mean of its divisors is an integer number (67704066708).

Almost surely, 2^203112200121 is an apocalyptic number.

It is an amenable number.

203112200121 is a deficient number, since it is larger than the sum of its proper divisors (67704066711).

203112200121 is an equidigital number, since it uses as much as digits as its factorization.

203112200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67704066710.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 203112200121 its reverse (121002211302), we get a palindrome (324114411423).

The spelling of 203112200121 in words is "two hundred three billion, one hundred twelve million, two hundred thousand, one hundred twenty-one".