1011525500521 has 4 divisors (see below), whose sum is σ = 1013191935232. Its totient is φ = 1009859065812.

The previous prime is 1011525500519. The next prime is 1011525500551. The reversal of 1011525500521 is 1250055251101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011525500521 - 2¹ = 1011525500519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011525500521.

It is not an unprimeable number, because it can be changed into a prime (1011525500551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833216445 + ... + 833217658.

It is an arithmetic number, because the mean of its divisors is an integer number (253297983808).

Almost surely, 2^{1011525500521} is an apocalyptic number.

It is an amenable number.

1011525500521 is a deficient number, since it is larger than the sum of its proper divisors (1666434711).

1011525500521 is an equidigital number, since it uses as much as digits as its factorization.

1011525500521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666434710.

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 1011525500521 in words is "one trillion, eleven billion, five hundred twenty-five million, five hundred thousand, five hundred twenty-one".