203021123403 has 16 divisors (see below), whose sum is σ = 309728228096. Its totient is φ = 115876055520.

The previous prime is 203021123353. The next prime is 203021123413. The reversal of 203021123403 is 304321120302.

203021123403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203021123403 - 2⁸ = 203021123147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 203021123403.

It is not an unprimeable number, because it can be changed into a prime (203021123413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5648953 + ... + 5684778.

It is an arithmetic number, because the mean of its divisors is an integer number (19358014256).

Almost surely, 2^203021123403 is an apocalyptic number.

203021123403 is a deficient number, since it is larger than the sum of its proper divisors (106707104693).

203021123403 is a wasteful number, since it uses less digits than its factorization.

203021123403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11334594.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203021123403 its reverse (304321120302), we get a palindrome (507342243705).

The spelling of 203021123403 in words is "two hundred three billion, twenty-one million, one hundred twenty-three thousand, four hundred three".