12820503229 has 4 divisors (see below), whose sum is σ = 12982788160. Its totient is φ = 12658218300.

The previous prime is 12820503203. The next prime is 12820503239. The reversal of 12820503229 is 92230502821.

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: 92230502821 = 84509 ⋅1091369.

It is a cyclic number.

It is not a de Polignac number, because 12820503229 - 2²¹ = 12818406077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12820503194 and 12820503203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820503239) 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, 81142347 + ... + 81142504.

It is an arithmetic number, because the mean of its divisors is an integer number (3245697040).

Almost surely, 2^12820503229 is an apocalyptic number.

It is an amenable number.

12820503229 is a deficient number, since it is larger than the sum of its proper divisors (162284931).

12820503229 is an equidigital number, since it uses as much as digits as its factorization.

12820503229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162284930.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 12820503229 in words is "twelve billion, eight hundred twenty million, five hundred three thousand, two hundred twenty-nine".