203032240121 has 4 divisors (see below), whose sum is σ = 203035315812. Its totient is φ = 203029164432.

The previous prime is 203032240109. The next prime is 203032240127. The reversal of 203032240121 is 121042230302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122836230400 + 80196009721 = 350480^2 + 283189^2 .

It is a cyclic number.

It is not a de Polignac number, because 203032240121 - 2⁶ = 203032240057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203032240093 and 203032240102.

It is not an unprimeable number, because it can be changed into a prime (203032240127) 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, 1436606 + ... + 1571591.

It is an arithmetic number, because the mean of its divisors is an integer number (50758828953).

Almost surely, 2^203032240121 is an apocalyptic number.

It is an amenable number.

203032240121 is a deficient number, since it is larger than the sum of its proper divisors (3075691).

203032240121 is an equidigital number, since it uses as much as digits as its factorization.

203032240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075690.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203032240121 its reverse (121042230302), we get a palindrome (324074470423).

The spelling of 203032240121 in words is "two hundred three billion, thirty-two million, two hundred forty thousand, one hundred twenty-one".