2101030109 has 2 divisors, whose sum is σ = 2101030110. Its totient is φ = 2101030108.

The previous prime is 2101030103. The next prime is 2101030111. The reversal of 2101030109 is 9010301012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1753766884 + 347263225 = 41878^2 + 18635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101030109 is a prime.

Together with 2101030111, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101030103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050515054 + 1050515055.

It is an arithmetic number, because the mean of its divisors is an integer number (1050515055).

Almost surely, 2^2101030109 is an apocalyptic number.

It is an amenable number.

2101030109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101030109 is an equidigital number, since it uses as much as digits as its factorization.

2101030109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 2101030109 is about 45836.9949822193. The cubic root of 2101030109 is about 1280.7885174463.

The spelling of 2101030109 in words is "two billion, one hundred one million, thirty thousand, one hundred nine".