201211010120689 has 2 divisors, whose sum is σ = 201211010120690. Its totient is φ = 201211010120688.

The previous prime is 201211010120677. The next prime is 201211010120759. The reversal of 201211010120689 is 986021010112102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122518001376225 + 78693008744464 = 11068785^2 + 8870908^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211010120689 - 2¹⁷ = 201211009989617 is a prime.

It is a super-2 number, since 2×201211010120689² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201211010120629) 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, 100605505060344 + 100605505060345.

It is an arithmetic number, because the mean of its divisors is an integer number (100605505060345).

Almost surely, 2^{201211010120689} is an apocalyptic number.

It is an amenable number.

201211010120689 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211010120689 is an equidigital number, since it uses as much as digits as its factorization.

201211010120689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 201211010120689 in words is "two hundred one trillion, two hundred eleven billion, ten million, one hundred twenty thousand, six hundred eighty-nine".