203530344102021 has 4 divisors (see below), whose sum is σ = 271373792136032. Its totient is φ = 135686896068012.

The previous prime is 203530344101999. The next prime is 203530344102031. The reversal of 203530344102021 is 120201443035302.

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 not a de Polignac number, because 203530344102021 - 2⁶ = 203530344101957 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 203530344102021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203530344102031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33921724017001 + ... + 33921724017006.

It is an arithmetic number, because the mean of its divisors is an integer number (67843448034008).

Almost surely, 2^{203530344102021} is an apocalyptic number.

It is an amenable number.

203530344102021 is a deficient number, since it is larger than the sum of its proper divisors (67843448034011).

203530344102021 is an equidigital number, since it uses as much as digits as its factorization.

203530344102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67843448034010.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 203530344102021 its reverse (120201443035302), we get a palindrome (323731787137323).

The spelling of 203530344102021 in words is "two hundred three trillion, five hundred thirty billion, three hundred forty-four million, one hundred two thousand, twenty-one".