1011521005 has 16 divisors (see below), whose sum is σ = 1333848384. Its totient is φ = 730276480.

The previous prime is 1011521003. The next prime is 1011521023. The reversal of 1011521005 is 5001251101.

It is not a de Polignac number, because 1011521005 - 2¹ = 1011521003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011521005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011521003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59587 + ... + 74656.

It is an arithmetic number, because the mean of its divisors is an integer number (83365524).

Almost surely, 2^1011521005 is an apocalyptic number.

It is an amenable number.

1011521005 is a deficient number, since it is larger than the sum of its proper divisors (322327379).

1011521005 is a wasteful number, since it uses less digits than its factorization.

1011521005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134396.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1011521005 is about 31804.4180107104. The cubic root of 1011521005 is about 1003.8256805047.

Adding to 1011521005 its reverse (5001251101), we get a palindrome (6012772106).

The spelling of 1011521005 in words is "one billion, eleven million, five hundred twenty-one thousand, five".