203021231130101 has 4 divisors (see below), whose sum is σ = 203021849222400. Its totient is φ = 203020613037804.

The previous prime is 203021231130073. The next prime is 203021231130103. The reversal of 203021231130101 is 101031132120302.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203021231130101 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 (203021231130103) 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, 308553191 + ... + 309210468.

It is an arithmetic number, because the mean of its divisors is an integer number (50755462305600).

Almost surely, 2^{203021231130101} is an apocalyptic number.

It is an amenable number.

203021231130101 is a deficient number, since it is larger than the sum of its proper divisors (618092299).

203021231130101 is an equidigital number, since it uses as much as digits as its factorization.

203021231130101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618092298.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 203021231130101 its reverse (101031132120302), we get a palindrome (304052363250403).

The spelling of 203021231130101 in words is "two hundred three trillion, twenty-one billion, two hundred thirty-one million, one hundred thirty thousand, one hundred one".