25013244021121 has 4 divisors (see below), whose sum is σ = 25820122860544. Its totient is φ = 24206365181700.

The previous prime is 25013244021109. The next prime is 25013244021127. The reversal of 25013244021121 is 12112044231052.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-25013244021121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25013244021121.

It is not an unprimeable number, because it can be changed into a prime (25013244021127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403439419665 + ... + 403439419726.

It is an arithmetic number, because the mean of its divisors is an integer number (6455030715136).

Almost surely, 2^{25013244021121} is an apocalyptic number.

It is an amenable number.

25013244021121 is a deficient number, since it is larger than the sum of its proper divisors (806878839423).

25013244021121 is an equidigital number, since it uses as much as digits as its factorization.

25013244021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806878839422.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 25013244021121 its reverse (12112044231052), we get a palindrome (37125288252173).

The spelling of 25013244021121 in words is "twenty-five trillion, thirteen billion, two hundred forty-four million, twenty-one thousand, one hundred twenty-one".