12748212101 has 4 divisors (see below), whose sum is σ = 13092758412. Its totient is φ = 12403665792.

The previous prime is 12748212079. The next prime is 12748212131. The reversal of 12748212101 is 10121284721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10121284721 = 223 ⋅45386927.

It can be written as a sum of positive squares in 2 ways, for example, as 6857496100 + 5890716001 = 82810^2 + 76751^2 .

It is a cyclic number.

It is not a de Polignac number, because 12748212101 - 2¹⁸ = 12747949957 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 (12748212131) 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, 172273100 + ... + 172273173.

It is an arithmetic number, because the mean of its divisors is an integer number (3273189603).

Almost surely, 2^12748212101 is an apocalyptic number.

It is an amenable number.

12748212101 is a deficient number, since it is larger than the sum of its proper divisors (344546311).

12748212101 is an equidigital number, since it uses as much as digits as its factorization.

12748212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344546310.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 12748212101 its reverse (10121284721), we get a palindrome (22869496822).

The spelling of 12748212101 in words is "twelve billion, seven hundred forty-eight million, two hundred twelve thousand, one hundred one".