203021220223 has 4 divisors (see below), whose sum is σ = 214963644960. Its totient is φ = 191078795488.

The previous prime is 203021220221. The next prime is 203021220247. The reversal of 203021220223 is 322022120302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322022120302 = 2 ⋅161011060151.

It is a cyclic number.

It is not a de Polignac number, because 203021220223 - 2¹ = 203021220221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203021220223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203021220221) 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, 5971212343 + ... + 5971212376.

It is an arithmetic number, because the mean of its divisors is an integer number (53740911240).

Almost surely, 2^203021220223 is an apocalyptic number.

203021220223 is a deficient number, since it is larger than the sum of its proper divisors (11942424737).

203021220223 is a wasteful number, since it uses less digits than its factorization.

203021220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11942424736.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 203021220223 its reverse (322022120302), we get a palindrome (525043340525).

The spelling of 203021220223 in words is "two hundred three billion, twenty-one million, two hundred twenty thousand, two hundred twenty-three".