211151020350509 has 2 divisors, whose sum is σ = 211151020350510. Its totient is φ = 211151020350508.

The previous prime is 211151020350493. The next prime is 211151020350527. The reversal of 211151020350509 is 905053020151112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111001964848009 + 100149055502500 = 10535747^2 + 10007450^2 .

It is a cyclic number.

It is not a de Polignac number, because 211151020350509 - 2⁴ = 211151020350493 is a prime.

It is a super-2 number, since 2×211151020350509² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211151020350409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105575510175254 + 105575510175255.

It is an arithmetic number, because the mean of its divisors is an integer number (105575510175255).

Almost surely, 2^{211151020350509} is an apocalyptic number.

It is an amenable number.

211151020350509 is a deficient number, since it is larger than the sum of its proper divisors (1).

211151020350509 is an equidigital number, since it uses as much as digits as its factorization.

211151020350509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 35.

The spelling of 211151020350509 in words is "two hundred eleven trillion, one hundred fifty-one billion, twenty million, three hundred fifty thousand, five hundred nine".