25253121100 has 18 divisors (see below), whose sum is σ = 54799273004. Its totient is φ = 10101248400.

The previous prime is 25253121097. The next prime is 25253121107. The reversal of 25253121100 is 112135252.

It is not an unprimeable number, because it can be changed into a prime (25253121107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126265506 + ... + 126265705.

Almost surely, 2^25253121100 is an apocalyptic number.

25253121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25253121100 is an abundant number, since it is smaller than the sum of its proper divisors (29546151904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25253121100 is a wasteful number, since it uses less digits than its factorization.

25253121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252531225 (or 252531218 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 25253121100 its reverse (112135252), we get a palindrome (25365256352).

The spelling of 25253121100 in words is "twenty-five billion, two hundred fifty-three million, one hundred twenty-one thousand, one hundred".