203311131013021 has 4 divisors (see below), whose sum is σ = 204161805201600. Its totient is φ = 202460456824444.

The previous prime is 203311131013007. The next prime is 203311131013043. The reversal of 203311131013021 is 120310131113302.

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 not a de Polignac number, because 203311131013021 - 2¹³ = 203311131004829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203311131012983 and 203311131013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203311131013061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425337093931 + ... + 425337094408.

It is an arithmetic number, because the mean of its divisors is an integer number (51040451300400).

Almost surely, 2^{203311131013021} is an apocalyptic number.

It is an amenable number.

203311131013021 is a deficient number, since it is larger than the sum of its proper divisors (850674188579).

203311131013021 is an equidigital number, since it uses as much as digits as its factorization.

203311131013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850674188578.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 203311131013021 its reverse (120310131113302), we get a palindrome (323621262126323).

The spelling of 203311131013021 in words is "two hundred three trillion, three hundred eleven billion, one hundred thirty-one million, thirteen thousand, twenty-one".