13121242104 has 32 divisors (see below), whose sum is σ = 32999541120. Its totient is φ = 4347555936.

The previous prime is 13121242103. The next prime is 13121242157. The reversal of 13121242104 is 40124212131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121242103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632874 + ... + 1640889.

It is an arithmetic number, because the mean of its divisors is an integer number (1031235660).

Almost surely, 2^13121242104 is an apocalyptic number.

It is an amenable number.

13121242104 is an abundant number, since it is smaller than the sum of its proper divisors (19878299016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121242104 is a wasteful number, since it uses less digits than its factorization.

13121242104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273939 (or 3273935 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 13121242104 its reverse (40124212131), we get a palindrome (53245454235).

The spelling of 13121242104 in words is "thirteen billion, one hundred twenty-one million, two hundred forty-two thousand, one hundred four".