203112030420221 has 16 divisors (see below), whose sum is σ = 218875065724224. Its totient is φ = 187368891435264.

The previous prime is 203112030420179. The next prime is 203112030420239. The reversal of 203112030420221 is 122024030211302.

It is a cyclic number.

It is not a de Polignac number, because 203112030420221 - 2³⁰ = 203110956678397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203112030420821) 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, 141402590 + ... + 142831776.

It is an arithmetic number, because the mean of its divisors is an integer number (13679691607764).

Almost surely, 2^{203112030420221} is an apocalyptic number.

It is an amenable number.

203112030420221 is a deficient number, since it is larger than the sum of its proper divisors (15763035304003).

203112030420221 is a wasteful number, since it uses less digits than its factorization.

203112030420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436140.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 203112030420221 its reverse (122024030211302), we get a palindrome (325136060631523).

The spelling of 203112030420221 in words is "two hundred three trillion, one hundred twelve billion, thirty million, four hundred twenty thousand, two hundred twenty-one".