25120145255221 has 8 divisors (see below), whose sum is σ = 25654904161920. Its totient is φ = 24585398337408.

The previous prime is 25120145255209. The next prime is 25120145255297. The reversal of 25120145255221 is 12255254102152.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25120145255221 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 (25120145253221) 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, 1302930 + ... + 7206796.

It is an arithmetic number, because the mean of its divisors is an integer number (3206863020240).

Almost surely, 2^{25120145255221} is an apocalyptic number.

It is an amenable number.

25120145255221 is a deficient number, since it is larger than the sum of its proper divisors (534758906699).

25120145255221 is an equidigital number, since it uses as much as digits as its factorization.

25120145255221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994443.

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 25120145255221 its reverse (12255254102152), we get a palindrome (37375399357373).

The spelling of 25120145255221 in words is "twenty-five trillion, one hundred twenty billion, one hundred forty-five million, two hundred fifty-five thousand, two hundred twenty-one".