201102111209 has 2 divisors, whose sum is σ = 201102111210. Its totient is φ = 201102111208.

The previous prime is 201102111191. The next prime is 201102111229. The reversal of 201102111209 is 902111201102.

It is an a-pointer prime, because the next prime (201102111229) can be obtained adding 201102111209 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192520867984 + 8581243225 = 438772^2 + 92635^2 .

It is a cyclic number.

It is not a de Polignac number, because 201102111209 - 2²⁸ = 200833675753 is a prime.

It is not a weakly prime, because it can be changed into another prime (201102111229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100551055604 + 100551055605.

It is an arithmetic number, because the mean of its divisors is an integer number (100551055605).

Almost surely, 2^201102111209 is an apocalyptic number.

It is an amenable number.

201102111209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201102111209 is an equidigital number, since it uses as much as digits as its factorization.

201102111209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 201102111209 in words is "two hundred one billion, one hundred two million, one hundred eleven thousand, two hundred nine".