11115221525 has 48 divisors (see below), whose sum is σ = 14309084160. Its totient is φ = 8560305600.

The previous prime is 11115221479. The next prime is 11115221573. The reversal of 11115221525 is 52512251111.

It is not a de Polignac number, because 11115221525 - 2⁸ = 11115221269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11115221494 and 11115221503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26527766 + ... + 26528184.

It is an arithmetic number, because the mean of its divisors is an integer number (298105920).

Almost surely, 2^11115221525 is an apocalyptic number.

It is an amenable number.

11115221525 is a deficient number, since it is larger than the sum of its proper divisors (3193862635).

11115221525 is a wasteful number, since it uses less digits than its factorization.

11115221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 789 counting only the distinct ones).

The product of its digits is 1000, while the sum is 26.

Adding to 11115221525 its reverse (52512251111), we get a palindrome (63627472636).

The spelling of 11115221525 in words is "eleven billion, one hundred fifteen million, two hundred twenty-one thousand, five hundred twenty-five".