20121025113 has 48 divisors (see below), whose sum is σ = 33897801600. Its totient is φ = 11263732992.

The previous prime is 20121025109. The next prime is 20121025139. The reversal of 20121025113 is 31152012102.

20121025113 is a `hidden beast` number, since 201 + 210 + 251 + 1 + 3 = 666.

It is not a de Polignac number, because 20121025113 - 2² = 20121025109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121025313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 670570 + ... + 699932.

It is an arithmetic number, because the mean of its divisors is an integer number (706204200).

Almost surely, 2^20121025113 is an apocalyptic number.

It is an amenable number.

20121025113 is a deficient number, since it is larger than the sum of its proper divisors (13776776487).

20121025113 is a wasteful number, since it uses less digits than its factorization.

20121025113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29598 (or 29595 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 20121025113 its reverse (31152012102), we get a palindrome (51273037215).

The spelling of 20121025113 in words is "twenty billion, one hundred twenty-one million, twenty-five thousand, one hundred thirteen".