203102231230221 has 4 divisors (see below), whose sum is σ = 270802974973632. Its totient is φ = 135401487486812.

The previous prime is 203102231230139. The next prime is 203102231230231. The reversal of 203102231230221 is 122032132201302.

203102231230221 is digitally balanced in base 2 and base 4, because in such bases 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 203102231230221 - 2¹¹ = 203102231228173 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203102231230191 and 203102231230200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203102231230231) 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, 33850371871701 + ... + 33850371871706.

It is an arithmetic number, because the mean of its divisors is an integer number (67700743743408).

Almost surely, 2^{203102231230221} is an apocalyptic number.

It is an amenable number.

203102231230221 is a deficient number, since it is larger than the sum of its proper divisors (67700743743411).

203102231230221 is an equidigital number, since it uses as much as digits as its factorization.

203102231230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67700743743410.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 203102231230221 its reverse (122032132201302), we get a palindrome (325134363431523).

The spelling of 203102231230221 in words is "two hundred three trillion, one hundred two billion, two hundred thirty-one million, two hundred thirty thousand, two hundred twenty-one".