2001100051217 has 2 divisors, whose sum is σ = 2001100051218. Its totient is φ = 2001100051216.

The previous prime is 2001100051133. The next prime is 2001100051241. The reversal of 2001100051217 is 7121500011002.

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., 1536945349696 + 464154701521 = 1239736^2 + 681289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001100051217 - 2¹⁰ = 2001100050193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001100051297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000550025608 + 1000550025609.

It is an arithmetic number, because the mean of its divisors is an integer number (1000550025609).

Almost surely, 2^{2001100051217} is an apocalyptic number.

It is an amenable number.

2001100051217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001100051217 is an equidigital number, since it uses as much as digits as its factorization.

2001100051217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 20.

Adding to 2001100051217 its reverse (7121500011002), we get a palindrome (9122600062219).

The spelling of 2001100051217 in words is "two trillion, one billion, one hundred million, fifty-one thousand, two hundred seventeen".