203320021123 has 4 divisors (see below), whose sum is σ = 203325568200. Its totient is φ = 203314474048.

The previous prime is 203320021111. The next prime is 203320021133. The reversal of 203320021123 is 321120023302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203320021123 - 2³³ = 194730086531 is a prime.

It is a super-2 number, since 2×203320021123² (a number of 23 digits) contains 22 as substring.

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 203320021123.

It is not an unprimeable number, because it can be changed into a prime (203320021103) 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, 2718190 + ... + 2791987.

It is an arithmetic number, because the mean of its divisors is an integer number (50831392050).

Almost surely, 2^203320021123 is an apocalyptic number.

203320021123 is a deficient number, since it is larger than the sum of its proper divisors (5547077).

203320021123 is an equidigital number, since it uses as much as digits as its factorization.

203320021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547076.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203320021123 its reverse (321120023302), we get a palindrome (524440044425).

The spelling of 203320021123 in words is "two hundred three billion, three hundred twenty million, twenty-one thousand, one hundred twenty-three".