211200109969 has 2 divisors, whose sum is σ = 211200109970. Its totient is φ = 211200109968.

The previous prime is 211200109961. The next prime is 211200110003. The reversal of 211200109969 is 969901002112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208031771025 + 3168338944 = 456105^2 + 56288^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200109969 - 2³ = 211200109961 is a prime.

It is a super-2 number, since 2×211200109969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211200109961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600054984 + 105600054985.

It is an arithmetic number, because the mean of its divisors is an integer number (105600054985).

Almost surely, 2^211200109969 is an apocalyptic number.

It is an amenable number.

211200109969 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200109969 is an equidigital number, since it uses as much as digits as its factorization.

211200109969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 211200109969 in words is "two hundred eleven billion, two hundred million, one hundred nine thousand, nine hundred sixty-nine".