203021021113 has 4 divisors (see below), whose sum is σ = 203066679040. Its totient is φ = 202975363188.

The previous prime is 203021021041. The next prime is 203021021209. The reversal of 203021021113 is 311120120302.

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 203021021113 - 2³⁷ = 65582067641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203022021113) 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, 22822293 + ... + 22831186.

It is an arithmetic number, because the mean of its divisors is an integer number (50766669760).

Almost surely, 2^203021021113 is an apocalyptic number.

It is an amenable number.

203021021113 is a deficient number, since it is larger than the sum of its proper divisors (45657927).

203021021113 is an equidigital number, since it uses as much as digits as its factorization.

203021021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45657926.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 203021021113 its reverse (311120120302), we get a palindrome (514141141415).

The spelling of 203021021113 in words is "two hundred three billion, twenty-one million, twenty-one thousand, one hundred thirteen".