2101884445057 has 4 divisors (see below), whose sum is σ = 2101962838996. Its totient is φ = 2101806051120.

The previous prime is 2101884445027. The next prime is 2101884445061. The reversal of 2101884445057 is 7505444881012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1782160920576 + 319723524481 = 1334976^2 + 565441^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101884445057 - 2¹⁹ = 2101883920769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101884445057.

It is not an unprimeable number, because it can be changed into a prime (2101884445027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39156738 + ... + 39210379.

It is an arithmetic number, because the mean of its divisors is an integer number (525490709749).

Almost surely, 2^{2101884445057} is an apocalyptic number.

It is an amenable number.

2101884445057 is a deficient number, since it is larger than the sum of its proper divisors (78393939).

2101884445057 is an equidigital number, since it uses as much as digits as its factorization.

2101884445057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78393938.

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 2101884445057 in words is "two trillion, one hundred one billion, eight hundred eighty-four million, four hundred forty-five thousand, fifty-seven".