13131032021 has 4 divisors (see below), whose sum is σ = 13155038112. Its totient is φ = 13107025932.

The previous prime is 13131032017. The next prime is 13131032053. The reversal of 13131032021 is 12023013131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12023013131 = 5689 ⋅2113379.

It is a cyclic number.

It is not a de Polignac number, because 13131032021 - 2² = 13131032017 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 (13131032071) 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, 12002225 + ... + 12003318.

It is an arithmetic number, because the mean of its divisors is an integer number (3288759528).

Almost surely, 2^13131032021 is an apocalyptic number.

It is an amenable number.

13131032021 is a deficient number, since it is larger than the sum of its proper divisors (24006091).

13131032021 is an equidigital number, since it uses as much as digits as its factorization.

13131032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24006090.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13131032021 its reverse (12023013131), we get a palindrome (25154045152).

The spelling of 13131032021 in words is "thirteen billion, one hundred thirty-one million, thirty-two thousand, twenty-one".