13120240021 has 8 divisors (see below), whose sum is σ = 15313593600. Its totient is φ = 11006644848.

The previous prime is 13120239971. The next prime is 13120240033. The reversal of 13120240021 is 12004202131.

13120240021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13120240021 - 2¹⁷ = 13120108949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120239977 and 13120240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120240121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19939246 + ... + 19939903.

It is an arithmetic number, because the mean of its divisors is an integer number (1914199200).

Almost surely, 2^13120240021 is an apocalyptic number.

It is an amenable number.

13120240021 is a deficient number, since it is larger than the sum of its proper divisors (2193353579).

13120240021 is an equidigital number, since it uses as much as digits as its factorization.

13120240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39879203.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13120240021 its reverse (12004202131), we get a palindrome (25124442152).

The spelling of 13120240021 in words is "thirteen billion, one hundred twenty million, two hundred forty thousand, twenty-one".