2105378101 has 2 divisors, whose sum is σ = 2105378102. Its totient is φ = 2105378100.

The previous prime is 2105378089. The next prime is 2105378173. The reversal of 2105378101 is 1018735012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1887815601 + 217562500 = 43449^2 + 14750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105378101 - 2¹³ = 2105369909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2105378101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105378701) 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, 1052689050 + 1052689051.

It is an arithmetic number, because the mean of its divisors is an integer number (1052689051).

Almost surely, 2^2105378101 is an apocalyptic number.

It is an amenable number.

2105378101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105378101 is an equidigital number, since it uses as much as digits as its factorization.

2105378101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 2105378101 is about 45884.3993204662. The cubic root of 2105378101 is about 1281.6714210452.

The spelling of 2105378101 in words is "two billion, one hundred five million, three hundred seventy-eight thousand, one hundred one".