12420324101 has 4 divisors (see below), whose sum is σ = 12421068492. Its totient is φ = 12419579712.

The previous prime is 12420324089. The next prime is 12420324109. The reversal of 12420324101 is 10142302421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1898693476 + 10521630625 = 43574^2 + 102575^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420324101 - 2³⁰ = 11346582277 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 (12420324109) 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, 346580 + ... + 380733.

It is an arithmetic number, because the mean of its divisors is an integer number (3105267123).

Almost surely, 2^12420324101 is an apocalyptic number.

It is an amenable number.

12420324101 is a deficient number, since it is larger than the sum of its proper divisors (744391).

12420324101 is an equidigital number, since it uses as much as digits as its factorization.

12420324101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744390.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12420324101 its reverse (10142302421), we get a palindrome (22562626522).

The spelling of 12420324101 in words is "twelve billion, four hundred twenty million, three hundred twenty-four thousand, one hundred one".