1021310320091 has 2 divisors, whose sum is σ = 1021310320092. Its totient is φ = 1021310320090.

The previous prime is 1021310320061. The next prime is 1021310320133. The reversal of 1021310320091 is 1900230131201.

It is a weak prime.

It is an emirp because it is prime and its reverse (1900230131201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021310320091 - 2⁶ = 1021310320027 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021310320061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510655160045 + 510655160046.

It is an arithmetic number, because the mean of its divisors is an integer number (510655160046).

Almost surely, 2^{1021310320091} is an apocalyptic number.

1021310320091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021310320091 is an equidigital number, since it uses as much as digits as its factorization.

1021310320091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 1021310320091 its reverse (1900230131201), we get a palindrome (2921540451292).

The spelling of 1021310320091 in words is "one trillion, twenty-one billion, three hundred ten million, three hundred twenty thousand, ninety-one".