203121104330423 has 4 divisors (see below), whose sum is σ = 203137684303848. Its totient is φ = 203104524357000.

The previous prime is 203121104330407. The next prime is 203121104330429. The reversal of 203121104330423 is 324033401121302.

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

It is a cyclic number.

It is not a de Polignac number, because 203121104330423 - 2⁴ = 203121104330407 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 (203121104330429) 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, 8289968336 + ... + 8289992837.

It is an arithmetic number, because the mean of its divisors is an integer number (50784421075962).

Almost surely, 2^{203121104330423} is an apocalyptic number.

203121104330423 is a deficient number, since it is larger than the sum of its proper divisors (16579973425).

203121104330423 is a wasteful number, since it uses less digits than its factorization.

203121104330423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16579973424.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 203121104330423 its reverse (324033401121302), we get a palindrome (527154505451725).

The spelling of 203121104330423 in words is "two hundred three trillion, one hundred twenty-one billion, one hundred four million, three hundred thirty thousand, four hundred twenty-three".