2102951443909 has 2 divisors, whose sum is σ = 2102951443910. Its totient is φ = 2102951443908.

The previous prime is 2102951443823. The next prime is 2102951443933. The reversal of 2102951443909 is 9093441592012.

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., 2019951562500 + 82999881409 = 1421250^2 + 288097^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102951443909 - 2²⁹ = 2102414572997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102951443979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051475721954 + 1051475721955.

It is an arithmetic number, because the mean of its divisors is an integer number (1051475721955).

Almost surely, 2^{2102951443909} is an apocalyptic number.

It is an amenable number.

2102951443909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102951443909 is an equidigital number, since it uses as much as digits as its factorization.

2102951443909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 2102951443909 in words is "two trillion, one hundred two billion, nine hundred fifty-one million, four hundred forty-three thousand, nine hundred nine".