4021031320321 has 2 divisors, whose sum is σ = 4021031320322. Its totient is φ = 4021031320320.

The previous prime is 4021031320301. The next prime is 4021031320331. The reversal of 4021031320321 is 1230231301204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3462669680625 + 558361639696 = 1860825^2 + 747236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021031320321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021031320292 and 4021031320301.

It is not a weakly prime, because it can be changed into another prime (4021031320301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010515660160 + 2010515660161.

It is an arithmetic number, because the mean of its divisors is an integer number (2010515660161).

Almost surely, 2^{4021031320321} is an apocalyptic number.

It is an amenable number.

4021031320321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021031320321 is an equidigital number, since it uses as much as digits as its factorization.

4021031320321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 4021031320321 its reverse (1230231301204), we get a palindrome (5251262621525).

The spelling of 4021031320321 in words is "four trillion, twenty-one billion, thirty-one million, three hundred twenty thousand, three hundred twenty-one".