20101201002217 has 2 divisors, whose sum is σ = 20101201002218. Its totient is φ = 20101201002216.

The previous prime is 20101201002143. The next prime is 20101201002251. The reversal of 20101201002217 is 71220010210102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18054859308201 + 2046341694016 = 4249101^2 + 1430504^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101201002217 - 2²³ = 20101192613609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101201002194 and 20101201002203.

It is not a weakly prime, because it can be changed into another prime (20101201002917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050600501108 + 10050600501109.

It is an arithmetic number, because the mean of its divisors is an integer number (10050600501109).

Almost surely, 2^{20101201002217} is an apocalyptic number.

It is an amenable number.

20101201002217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101201002217 is an equidigital number, since it uses as much as digits as its factorization.

20101201002217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 20101201002217 its reverse (71220010210102), we get a palindrome (91321211212319).

The spelling of 20101201002217 in words is "twenty trillion, one hundred one billion, two hundred one million, two thousand, two hundred seventeen".