1000021310993 has 2 divisors, whose sum is σ = 1000021310994. Its totient is φ = 1000021310992.

The previous prime is 1000021310969. The next prime is 1000021311013. The reversal of 1000021310993 is 3990131200001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946316492944 + 53704818049 = 972788^2 + 231743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000021310993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000021310923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010655496 + 500010655497.

It is an arithmetic number, because the mean of its divisors is an integer number (500010655497).

Almost surely, 2^{1000021310993} is an apocalyptic number.

It is an amenable number.

1000021310993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000021310993 is an equidigital number, since it uses as much as digits as its factorization.

1000021310993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

Adding to 1000021310993 its reverse (3990131200001), we get a palindrome (4990152510994).

The spelling of 1000021310993 in words is "one trillion, twenty-one million, three hundred ten thousand, nine hundred ninety-three".