1021304112217 has 2 divisors, whose sum is σ = 1021304112218. Its totient is φ = 1021304112216.

The previous prime is 1021304112197. The next prime is 1021304112223. The reversal of 1021304112217 is 7122114031201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1021047599961 + 256512256 = 1010469^2 + 16016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021304112217 - 2²⁷ = 1021169894489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021304112191 and 1021304112200.

It is not a weakly prime, because it can be changed into another prime (1021304112287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510652056108 + 510652056109.

It is an arithmetic number, because the mean of its divisors is an integer number (510652056109).

Almost surely, 2^{1021304112217} is an apocalyptic number.

It is an amenable number.

1021304112217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021304112217 is an equidigital number, since it uses as much as digits as its factorization.

1021304112217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 1021304112217 its reverse (7122114031201), we get a palindrome (8143418143418).

The spelling of 1021304112217 in words is "one trillion, twenty-one billion, three hundred four million, one hundred twelve thousand, two hundred seventeen".