13143212021 has 4 divisors (see below), whose sum is σ = 13171599552. Its totient is φ = 13114824492.

The previous prime is 13143212009. The next prime is 13143212029. The reversal of 13143212021 is 12021234131.

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: 12021234131 = 72689 ⋅165379.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13143212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13143211984 and 13143212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143212029) 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, 14193071 + ... + 14193996.

It is an arithmetic number, because the mean of its divisors is an integer number (3292899888).

Almost surely, 2^13143212021 is an apocalyptic number.

It is an amenable number.

13143212021 is a deficient number, since it is larger than the sum of its proper divisors (28387531).

13143212021 is an equidigital number, since it uses as much as digits as its factorization.

13143212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28387530.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13143212021 its reverse (12021234131), we get a palindrome (25164446152).

The spelling of 13143212021 in words is "thirteen billion, one hundred forty-three million, two hundred twelve thousand, twenty-one".