1021323141205 has 4 divisors (see below), whose sum is σ = 1225587769452. Its totient is φ = 817058512960.

The previous prime is 1021323141187. The next prime is 1021323141233. The reversal of 1021323141205 is 5021413231201.

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 699446196241 + 321876944964 = 836329^2 + 567342^2 .

It is not a de Polignac number, because 1021323141205 - 2⁵ = 1021323141173 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 1021323141205.

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, 102132314116 + ... + 102132314125.

It is an arithmetic number, because the mean of its divisors is an integer number (306396942363).

Almost surely, 2^{1021323141205} is an apocalyptic number.

It is an amenable number.

1021323141205 is a deficient number, since it is larger than the sum of its proper divisors (204264628247).

1021323141205 is an equidigital number, since it uses as much as digits as its factorization.

1021323141205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204264628246.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1021323141205 its reverse (5021413231201), we get a palindrome (6042736372406).

The spelling of 1021323141205 in words is "one trillion, twenty-one billion, three hundred twenty-three million, one hundred forty-one thousand, two hundred five".