11211012100217 has 2 divisors, whose sum is σ = 11211012100218. Its totient is φ = 11211012100216.

The previous prime is 11211012100201. The next prime is 11211012100243. The reversal of 11211012100217 is 71200121011211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10859160264976 + 351851835241 = 3295324^2 + 593171^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211012100217 - 2⁴ = 11211012100201 is a prime.

It is a super-2 number, since 2×11211012100217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211012103217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605506050108 + 5605506050109.

It is an arithmetic number, because the mean of its divisors is an integer number (5605506050109).

Almost surely, 2^{11211012100217} is an apocalyptic number.

It is an amenable number.

11211012100217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211012100217 is an equidigital number, since it uses as much as digits as its factorization.

11211012100217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 11211012100217 its reverse (71200121011211), we get a palindrome (82411133111428).

The spelling of 11211012100217 in words is "eleven trillion, two hundred eleven billion, twelve million, one hundred thousand, two hundred seventeen".