211001210117 has 2 divisors, whose sum is σ = 211001210118. Its totient is φ = 211001210116.

The previous prime is 211001210081. The next prime is 211001210143. The reversal of 211001210117 is 711012100112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189404262436 + 21596947681 = 435206^2 + 146959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211001210117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211001210095 and 211001210104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211001213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500605058 + 105500605059.

It is an arithmetic number, because the mean of its divisors is an integer number (105500605059).

Almost surely, 2^211001210117 is an apocalyptic number.

It is an amenable number.

211001210117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211001210117 is an equidigital number, since it uses as much as digits as its factorization.

211001210117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 211001210117 its reverse (711012100112), we get a palindrome (922013310229).

The spelling of 211001210117 in words is "two hundred eleven billion, one million, two hundred ten thousand, one hundred seventeen".