1021056993799 has 2 divisors, whose sum is σ = 1021056993800. Its totient is φ = 1021056993798.

The previous prime is 1021056993787. The next prime is 1021056993821. The reversal of 1021056993799 is 9973996501201.

It is a weak prime.

It is an emirp because it is prime and its reverse (9973996501201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021056993799 - 2¹¹ = 1021056991751 is a prime.

It is a super-2 number, since 2×1021056993799² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021056993739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510528496899 + 510528496900.

It is an arithmetic number, because the mean of its divisors is an integer number (510528496900).

Almost surely, 2^{1021056993799} is an apocalyptic number.

1021056993799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021056993799 is an equidigital number, since it uses as much as digits as its factorization.

1021056993799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8266860, while the sum is 61.

The spelling of 1021056993799 in words is "one trillion, twenty-one billion, fifty-six million, nine hundred ninety-three thousand, seven hundred ninety-nine".