203221020331101 has 4 divisors (see below), whose sum is σ = 270961360441472. Its totient is φ = 135480680220732.

The previous prime is 203221020331097. The next prime is 203221020331103. The reversal of 203221020331101 is 101133020122302.

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 203221020331101 - 2² = 203221020331097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203221020331103) 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, 33870170055181 + ... + 33870170055186.

It is an arithmetic number, because the mean of its divisors is an integer number (67740340110368).

Almost surely, 2^{203221020331101} is an apocalyptic number.

It is an amenable number.

203221020331101 is a deficient number, since it is larger than the sum of its proper divisors (67740340110371).

203221020331101 is an equidigital number, since it uses as much as digits as its factorization.

203221020331101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67740340110370.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 203221020331101 its reverse (101133020122302), we get a palindrome (304354040453403).

The spelling of 203221020331101 in words is "two hundred three trillion, two hundred twenty-one billion, twenty million, three hundred thirty-one thousand, one hundred one".