2101101109 has 2 divisors, whose sum is σ = 2101101110. Its totient is φ = 2101101108.

The previous prime is 2101101049. The next prime is 2101101137. The reversal of 2101101109 is 9011011012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223460484 + 877640625 = 34978^2 + 29625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101101109 - 2⁹ = 2101100597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101101092 and 2101101101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101101139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050550554 + 1050550555.

It is an arithmetic number, because the mean of its divisors is an integer number (1050550555).

Almost surely, 2^2101101109 is an apocalyptic number.

It is an amenable number.

2101101109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101101109 is an equidigital number, since it uses as much as digits as its factorization.

2101101109 is an evil number, because the sum of its binary digits is even.

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

The square root of 2101101109 is about 45837.7694592571. The cubic root of 2101101109 is about 1280.8029444902.

The spelling of 2101101109 in words is "two billion, one hundred one million, one hundred one thousand, one hundred nine".