203453230121 has 4 divisors (see below), whose sum is σ = 203457408000. Its totient is φ = 203449052244.

The previous prime is 203453230093. The next prime is 203453230133. The reversal of 203453230121 is 121032354302.

It is a happy number.

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 203453230121 - 2³⁴ = 186273360937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203453230151) 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, 2015021 + ... + 2113578.

It is an arithmetic number, because the mean of its divisors is an integer number (50864352000).

Almost surely, 2^203453230121 is an apocalyptic number.

It is an amenable number.

203453230121 is a deficient number, since it is larger than the sum of its proper divisors (4177879).

203453230121 is an equidigital number, since it uses as much as digits as its factorization.

203453230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177878.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 203453230121 its reverse (121032354302), we get a palindrome (324485584423).

The spelling of 203453230121 in words is "two hundred three billion, four hundred fifty-three million, two hundred thirty thousand, one hundred twenty-one".