13031303021 has 4 divisors (see below), whose sum is σ = 14215966944. Its totient is φ = 11846639100.

The previous prime is 13031303017. The next prime is 13031303057. The reversal of 13031303021 is 12030313031.

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 13031303021 - 2² = 13031303017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031303011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592331945 + ... + 592331966.

It is an arithmetic number, because the mean of its divisors is an integer number (3553991736).

Almost surely, 2^13031303021 is an apocalyptic number.

13031303021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13031303021 is a deficient number, since it is larger than the sum of its proper divisors (1184663923).

13031303021 is a wasteful number, since it uses less digits than its factorization.

13031303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184663922.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 13031303021 its reverse (12030313031), we get a palindrome (25061616052).

The spelling of 13031303021 in words is "thirteen billion, thirty-one million, three hundred three thousand, twenty-one".