1021102011217 has 2 divisors, whose sum is σ = 1021102011218. Its totient is φ = 1021102011216.

The previous prime is 1021102011211. The next prime is 1021102011227. The reversal of 1021102011217 is 7121102011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863271407376 + 157830603841 = 929124^2 + 397279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021102011217 is a prime.

It is a super-2 number, since 2×1021102011217² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021102011194 and 1021102011203.

It is not a weakly prime, because it can be changed into another prime (1021102011211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510551005608 + 510551005609.

It is an arithmetic number, because the mean of its divisors is an integer number (510551005609).

Almost surely, 2^{1021102011217} is an apocalyptic number.

It is an amenable number.

1021102011217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021102011217 is an equidigital number, since it uses as much as digits as its factorization.

1021102011217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 1021102011217 its reverse (7121102011201), we get a palindrome (8142204022418).

The spelling of 1021102011217 in words is "one trillion, twenty-one billion, one hundred two million, eleven thousand, two hundred seventeen".