2125240421 has 4 divisors (see below), whose sum is σ = 2237095200. Its totient is φ = 2013385644.

The previous prime is 2125240399. The next prime is 2125240423. The reversal of 2125240421 is 1240425212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125240421 - 2²⁶ = 2058131557 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 (2125240423) 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 3 ways as a sum of consecutive naturals, for example, 55927361 + ... + 55927398.

It is an arithmetic number, because the mean of its divisors is an integer number (559273800).

Almost surely, 2^2125240421 is an apocalyptic number.

It is an amenable number.

2125240421 is a deficient number, since it is larger than the sum of its proper divisors (111854779).

2125240421 is a wasteful number, since it uses less digits than its factorization.

2125240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111854778.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2125240421 is about 46100.3299445893. The cubic root of 2125240421 is about 1285.6892789981.

Adding to 2125240421 its reverse (1240425212), we get a palindrome (3365665633).

The spelling of 2125240421 in words is "two billion, one hundred twenty-five million, two hundred forty thousand, four hundred twenty-one".