13240421125 has 16 divisors (see below), whose sum is σ = 16531968960. Its totient is φ = 10587258000.

The previous prime is 13240421123. The next prime is 13240421167. The reversal of 13240421125 is 52112404231.

It is not a de Polignac number, because 13240421125 - 2¹ = 13240421123 is a prime.

It is a super-3 number, since 3×13240421125³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 13240421125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240421123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248070 + ... + 296680.

It is an arithmetic number, because the mean of its divisors is an integer number (1033248060).

Almost surely, 2^13240421125 is an apocalyptic number.

It is an amenable number.

13240421125 is a deficient number, since it is larger than the sum of its proper divisors (3291547835).

13240421125 is an equidigital number, since it uses as much as digits as its factorization.

13240421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50805 (or 50795 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 13240421125 its reverse (52112404231), we get a palindrome (65352825356).

The spelling of 13240421125 in words is "thirteen billion, two hundred forty million, four hundred twenty-one thousand, one hundred twenty-five".