2100103009 has 2 divisors, whose sum is σ = 2100103010. Its totient is φ = 2100103008.

The previous prime is 2100102997. The next prime is 2100103037. The reversal of 2100103009 is 9003010012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1903402384 + 196700625 = 43628^2 + 14025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100103009 - 2¹³ = 2100094817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100102983 and 2100103001.

It is not a weakly prime, because it can be changed into another prime (2100103039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050051504 + 1050051505.

It is an arithmetic number, because the mean of its divisors is an integer number (1050051505).

Almost surely, 2^2100103009 is an apocalyptic number.

It is an amenable number.

2100103009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100103009 is an equidigital number, since it uses as much as digits as its factorization.

2100103009 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 16.

The square root of 2100103009 is about 45826.8808561089. The cubic root of 2100103009 is about 1280.6001029276.

The spelling of 2100103009 in words is "two billion, one hundred million, one hundred three thousand, nine".