1021221113005 has 4 divisors (see below), whose sum is σ = 1225465335612. Its totient is φ = 816976890400.

The previous prime is 1021221112997. The next prime is 1021221113039. The reversal of 1021221113005 is 5003111221201.

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 577469287396 + 443751825609 = 759914^2 + 666147^2 .

It is not a de Polignac number, because 1021221113005 - 2³ = 1021221112997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102122111296 + ... + 102122111305.

It is an arithmetic number, because the mean of its divisors is an integer number (306366333903).

Almost surely, 2^{1021221113005} is an apocalyptic number.

It is an amenable number.

1021221113005 is a deficient number, since it is larger than the sum of its proper divisors (204244222607).

1021221113005 is an equidigital number, since it uses as much as digits as its factorization.

1021221113005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204244222606.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 1021221113005 its reverse (5003111221201), we get a palindrome (6024332334206).

The spelling of 1021221113005 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, five".