1021231404321 has 4 divisors (see below), whose sum is σ = 1361641872432. Its totient is φ = 680820936212.

The previous prime is 1021231404317. The next prime is 1021231404341. The reversal of 1021231404321 is 1234041321201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021231404321 - 2² = 1021231404317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021231404291 and 1021231404300.

It is not an unprimeable number, because it can be changed into a prime (1021231404341) 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, 170205234051 + ... + 170205234056.

It is an arithmetic number, because the mean of its divisors is an integer number (340410468108).

Almost surely, 2^{1021231404321} is an apocalyptic number.

It is an amenable number.

1021231404321 is a deficient number, since it is larger than the sum of its proper divisors (340410468111).

1021231404321 is an equidigital number, since it uses as much as digits as its factorization.

1021231404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340410468110.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1021231404321 its reverse (1234041321201), we get a palindrome (2255272725522).

The spelling of 1021231404321 in words is "one trillion, twenty-one billion, two hundred thirty-one million, four hundred four thousand, three hundred twenty-one".