203231002121 has 16 divisors (see below), whose sum is σ = 243763409664. Its totient is φ = 165661007424.

The previous prime is 203231002111. The next prime is 203231002129. The reversal of 203231002121 is 121200132302.

203231002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 203231002121 - 2⁶ = 203231002057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203231002121.

It is not an unprimeable number, because it can be changed into a prime (203231002129) 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, 3620426 + ... + 3676131.

It is an arithmetic number, because the mean of its divisors is an integer number (15235213104).

Almost surely, 2^203231002121 is an apocalyptic number.

It is an amenable number.

203231002121 is a deficient number, since it is larger than the sum of its proper divisors (40532407543).

203231002121 is a wasteful number, since it uses less digits than its factorization.

203231002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7296760.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203231002121 its reverse (121200132302), we get a palindrome (324431134423).

The spelling of 203231002121 in words is "two hundred three billion, two hundred thirty-one million, two thousand, one hundred twenty-one".