25135113221 has 8 divisors (see below), whose sum is σ = 25905411840. Its totient is φ = 24374627568.

The previous prime is 25135113191. The next prime is 25135113277. The reversal of 25135113221 is 12231153152.

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

It is a cyclic number.

It is not a de Polignac number, because 25135113221 - 2¹⁴ = 25135096837 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 (25135113121) 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, 2448041 + ... + 2458286.

It is an arithmetic number, because the mean of its divisors is an integer number (3238176480).

Almost surely, 2^25135113221 is an apocalyptic number.

It is an amenable number.

25135113221 is a deficient number, since it is larger than the sum of its proper divisors (770298619).

25135113221 is a wasteful number, since it uses less digits than its factorization.

25135113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906483.

The product of its digits is 1800, while the sum is 26.

Adding to 25135113221 its reverse (12231153152), we get a palindrome (37366266373).

The spelling of 25135113221 in words is "twenty-five billion, one hundred thirty-five million, one hundred thirteen thousand, two hundred twenty-one".