203230154021 has 4 divisors (see below), whose sum is σ = 204692241600. Its totient is φ = 201768066444.

The previous prime is 203230154011. The next prime is 203230154033. The reversal of 203230154021 is 120451032302.

203230154021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 203230154021 - 2¹⁴ = 203230137637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203230154011) 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 3 ways as a sum of consecutive naturals, for example, 731043581 + ... + 731043858.

It is an arithmetic number, because the mean of its divisors is an integer number (51173060400).

Almost surely, 2^203230154021 is an apocalyptic number.

It is an amenable number.

203230154021 is a deficient number, since it is larger than the sum of its proper divisors (1462087579).

203230154021 is a wasteful number, since it uses less digits than its factorization.

203230154021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462087578.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 203230154021 its reverse (120451032302), we get a palindrome (323681186323).

The spelling of 203230154021 in words is "two hundred three billion, two hundred thirty million, one hundred fifty-four thousand, twenty-one".