211202220121117 has 2 divisors, whose sum is σ = 211202220121118. Its totient is φ = 211202220121116.

The previous prime is 211202220121103. The next prime is 211202220121141. The reversal of 211202220121117 is 711121022202112.

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., 161436616704441 + 49765603416676 = 12705771^2 + 7054474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211202220121117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211202220121091 and 211202220121100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211205220121117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105601110060558 + 105601110060559.

It is an arithmetic number, because the mean of its divisors is an integer number (105601110060559).

Almost surely, 2^{211202220121117} is an apocalyptic number.

It is an amenable number.

211202220121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

211202220121117 is an equidigital number, since it uses as much as digits as its factorization.

211202220121117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 211202220121117 its reverse (711121022202112), we get a palindrome (922323242323229).

The spelling of 211202220121117 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty million, one hundred twenty-one thousand, one hundred seventeen".