2001102221917 has 2 divisors, whose sum is σ = 2001102221918. Its totient is φ = 2001102221916.

The previous prime is 2001102221843. The next prime is 2001102222059. The reversal of 2001102221917 is 7191222011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371196502361 + 629905719556 = 1170981^2 + 793666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001102221917 is a prime.

It is a super-2 number, since 2×2001102221917² (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 (2001102221617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000551110958 + 1000551110959.

It is an arithmetic number, because the mean of its divisors is an integer number (1000551110959).

Almost surely, 2^{2001102221917} is an apocalyptic number.

It is an amenable number.

2001102221917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001102221917 is an equidigital number, since it uses as much as digits as its factorization.

2001102221917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 2001102221917 its reverse (7191222011002), we get a palindrome (9192324232919).

The spelling of 2001102221917 in words is "two trillion, one billion, one hundred two million, two hundred twenty-one thousand, nine hundred seventeen".