1021311301323 has 4 divisors (see below), whose sum is σ = 1361748401768. Its totient is φ = 680874200880.

The previous prime is 1021311301249. The next prime is 1021311301327. The reversal of 1021311301323 is 3231031131201.

It is a happy number.

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

It is not a de Polignac number, because 1021311301323 - 2¹⁰ = 1021311300299 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 1021311301323.

It is not an unprimeable number, because it can be changed into a prime (1021311301327) 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, 170218550218 + ... + 170218550223.

It is an arithmetic number, because the mean of its divisors is an integer number (340437100442).

Almost surely, 2^{1021311301323} is an apocalyptic number.

1021311301323 is a deficient number, since it is larger than the sum of its proper divisors (340437100445).

1021311301323 is an equidigital number, since it uses as much as digits as its factorization.

1021311301323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340437100444.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1021311301323 its reverse (3231031131201), we get a palindrome (4252342432524).

The spelling of 1021311301323 in words is "one trillion, twenty-one billion, three hundred eleven million, three hundred one thousand, three hundred twenty-three".