20121012525 has 12 divisors (see below), whose sum is σ = 33266740832. Its totient is φ = 10731206640.

The previous prime is 20121012511. The next prime is 20121012529. The reversal of 20121012525 is 52521012102.

It is not a de Polignac number, because 20121012525 - 2⁹ = 20121012013 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 (20121012529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134140009 + ... + 134140158.

Almost surely, 2^20121012525 is an apocalyptic number.

20121012525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20121012525 is a deficient number, since it is larger than the sum of its proper divisors (13145728307).

20121012525 is a wasteful number, since it uses less digits than its factorization.

20121012525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268280180 (or 268280175 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20121012525 its reverse (52521012102), we get a palindrome (72642024627).

The spelling of 20121012525 in words is "twenty billion, one hundred twenty-one million, twelve thousand, five hundred twenty-five".