203401312421203 has 16 divisors (see below), whose sum is σ = 228572137543680. Its totient is φ = 179591194705824.

The previous prime is 203401312421159. The next prime is 203401312421227. The reversal of 203401312421203 is 302124213104302.

It is a cyclic number.

It is not a de Polignac number, because 203401312421203 - 2⁴¹ = 201202289165651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203401312421803) 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, 105205878 + ... + 107121796.

It is an arithmetic number, because the mean of its divisors is an integer number (14285758596480).

Almost surely, 2^{203401312421203} is an apocalyptic number.

203401312421203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203401312421203 is a deficient number, since it is larger than the sum of its proper divisors (25170825122477).

203401312421203 is a wasteful number, since it uses less digits than its factorization.

203401312421203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271018.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 203401312421203 its reverse (302124213104302), we get a palindrome (505525525525505).

The spelling of 203401312421203 in words is "two hundred three trillion, four hundred one billion, three hundred twelve million, four hundred twenty-one thousand, two hundred three".