201211101109 has 2 divisors, whose sum is σ = 201211101110. Its totient is φ = 201211101108.

The previous prime is 201211101083. The next prime is 201211101127. The reversal of 201211101109 is 901101112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127482560209 + 73728540900 = 357047^2 + 271530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211101109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211191109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605550554 + 100605550555.

It is an arithmetic number, because the mean of its divisors is an integer number (100605550555).

Almost surely, 2^201211101109 is an apocalyptic number.

It is an amenable number.

201211101109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211101109 is an equidigital number, since it uses as much as digits as its factorization.

201211101109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 201211101109 in words is "two hundred one billion, two hundred eleven million, one hundred one thousand, one hundred nine".