1021003113005 has 4 divisors (see below), whose sum is σ = 1225203735612. Its totient is φ = 816802490400.

The previous prime is 1021003112957. The next prime is 1021003113007. The reversal of 1021003113005 is 5003113001201.

1021003113005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 580258492009 + 440744620996 = 761747^2 + 663886^2 .

It is not a de Polignac number, because 1021003113005 - 2¹⁴ = 1021003096621 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 (1021003113007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102100311296 + ... + 102100311305.

It is an arithmetic number, because the mean of its divisors is an integer number (306300933903).

Almost surely, 2^{1021003113005} is an apocalyptic number.

It is an amenable number.

1021003113005 is a deficient number, since it is larger than the sum of its proper divisors (204200622607).

1021003113005 is an equidigital number, since it uses as much as digits as its factorization.

1021003113005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204200622606.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 1021003113005 its reverse (5003113001201), we get a palindrome (6024116114206).

The spelling of 1021003113005 in words is "one trillion, twenty-one billion, three million, one hundred thirteen thousand, five".