20101110109 has 2 divisors, whose sum is σ = 20101110110. Its totient is φ = 20101110108.

The previous prime is 20101110101. The next prime is 20101110121. The reversal of 20101110109 is 90101110102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19251562500 + 849547609 = 138750^2 + 29147^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101110109 - 2³ = 20101110101 is a prime.

It is a super-2 number, since 2×20101110109² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20101110092 and 20101110101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101110101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050555054 + 10050555055.

It is an arithmetic number, because the mean of its divisors is an integer number (10050555055).

Almost surely, 2^20101110109 is an apocalyptic number.

It is an amenable number.

20101110109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101110109 is an equidigital number, since it uses as much as digits as its factorization.

20101110109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 20101110109 in words is "twenty billion, one hundred one million, one hundred ten thousand, one hundred nine".