1021231321321 has 8 divisors (see below), whose sum is σ = 1056616473600. Its totient is φ = 985857521040.

The previous prime is 1021231321267. The next prime is 1021231321343. The reversal of 1021231321321 is 1231231321201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021231321321 - 2¹⁷ = 1021231190249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021231321292 and 1021231321301.

It is not an unprimeable number, because it can be changed into a prime (1021231321021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2654761 + ... + 3014998.

It is an arithmetic number, because the mean of its divisors is an integer number (132077059200).

Almost surely, 2^{1021231321321} is an apocalyptic number.

It is an amenable number.

1021231321321 is a deficient number, since it is larger than the sum of its proper divisors (35385152279).

1021231321321 is an equidigital number, since it uses as much as digits as its factorization.

1021231321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675999.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1021231321321 its reverse (1231231321201), we get a palindrome (2252462642522).

The spelling of 1021231321321 in words is "one trillion, twenty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred twenty-one".