201131310109 has 2 divisors, whose sum is σ = 201131310110. Its totient is φ = 201131310108.

The previous prime is 201131310103. The next prime is 201131310199. The reversal of 201131310109 is 901013131102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171874918084 + 29256392025 = 414578^2 + 171045^2 .

It is a cyclic number.

It is not a de Polignac number, because 201131310109 - 2⁵ = 201131310077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201131310109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201131310103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100565655054 + 100565655055.

It is an arithmetic number, because the mean of its divisors is an integer number (100565655055).

Almost surely, 2^201131310109 is an apocalyptic number.

It is an amenable number.

201131310109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201131310109 is an equidigital number, since it uses as much as digits as its factorization.

201131310109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 201131310109 in words is "two hundred one billion, one hundred thirty-one million, three hundred ten thousand, one hundred nine".