211204400117 has 2 divisors, whose sum is σ = 211204400118. Its totient is φ = 211204400116.

The previous prime is 211204400111. The next prime is 211204400167. The reversal of 211204400117 is 711004402112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209128777636 + 2075622481 = 457306^2 + 45559^2 .

It is a cyclic number.

It is not a de Polignac number, because 211204400117 - 2²⁴ = 211187622901 is a prime.

It is a super-2 number, since 2×211204400117² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211204400092 and 211204400101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211204400111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105602200058 + 105602200059.

It is an arithmetic number, because the mean of its divisors is an integer number (105602200059).

Almost surely, 2^211204400117 is an apocalyptic number.

It is an amenable number.

211204400117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211204400117 is an equidigital number, since it uses as much as digits as its factorization.

211204400117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 211204400117 its reverse (711004402112), we get a palindrome (922208802229).

The spelling of 211204400117 in words is "two hundred eleven billion, two hundred four million, four hundred thousand, one hundred seventeen".