203121323221233 has 16 divisors (see below), whose sum is σ = 270967944100736. Its totient is φ = 135344471425920.

The previous prime is 203121323221213. The next prime is 203121323221307. The reversal of 203121323221233 is 332122323121302.

203121323221233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203121323221233 - 2¹³ = 203121323213041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 203121323221233.

It is not an unprimeable number, because it can be changed into a prime (203121323221213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63596853 + ... + 66714333.

It is an arithmetic number, because the mean of its divisors is an integer number (16935496506296).

Almost surely, 2^{203121323221233} is an apocalyptic number.

It is an amenable number.

203121323221233 is a deficient number, since it is larger than the sum of its proper divisors (67846620879503).

203121323221233 is a wasteful number, since it uses less digits than its factorization.

203121323221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128664.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 203121323221233 its reverse (332122323121302), we get a palindrome (535243646342535).

The spelling of 203121323221233 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, two hundred thirty-three".