11525121020 has 96 divisors (see below), whose sum is σ = 27851765760. Its totient is φ = 3924241920.

The previous prime is 11525121017. The next prime is 11525121059. The reversal of 11525121020 is 2012152511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11525120983 and 11525121001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24678827 + ... + 24679293.

It is an arithmetic number, because the mean of its divisors is an integer number (290122560).

Almost surely, 2^11525121020 is an apocalyptic number.

11525121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11525121020 is an abundant number, since it is smaller than the sum of its proper divisors (16326644740).

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

11525121020 is a wasteful number, since it uses less digits than its factorization.

11525121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 11525121020 its reverse (2012152511), we get a palindrome (13537273531).

The spelling of 11525121020 in words is "eleven billion, five hundred twenty-five million, one hundred twenty-one thousand, twenty".