203313130444421 has 4 divisors (see below), whose sum is σ = 205762686232992. Its totient is φ = 200863574655852.

The previous prime is 203313130444367. The next prime is 203313130444441. The reversal of 203313130444421 is 124444031313302.

203313130444421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 203313130444421 - 2³⁰ = 203312056702597 is a prime.

It is a super-2 number, since 2×203313130444421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203313130444441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224777894161 + ... + 1224777894326.

It is an arithmetic number, because the mean of its divisors is an integer number (51440671558248).

Almost surely, 2^{203313130444421} is an apocalyptic number.

It is an amenable number.

203313130444421 is a deficient number, since it is larger than the sum of its proper divisors (2449555788571).

203313130444421 is an equidigital number, since it uses as much as digits as its factorization.

203313130444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449555788570.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 203313130444421 its reverse (124444031313302), we get a palindrome (327757161757723).

The spelling of 203313130444421 in words is "two hundred three trillion, three hundred thirteen billion, one hundred thirty million, four hundred forty-four thousand, four hundred twenty-one".