2105121050449 has 4 divisors (see below), whose sum is σ = 2105124010164. Its totient is φ = 2105118090736.

The previous prime is 2105121050443. The next prime is 2105121050467. The reversal of 2105121050449 is 9440501215012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1733783159824 + 371337890625 = 1316732^2 + 609375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105121050449 - 2⁹ = 2105121049937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105121050443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302979 + ... + 2074135.

It is an arithmetic number, because the mean of its divisors is an integer number (526281002541).

Almost surely, 2^{2105121050449} is an apocalyptic number.

It is an amenable number.

2105121050449 is a deficient number, since it is larger than the sum of its proper divisors (2959715).

2105121050449 is a wasteful number, since it uses less digits than its factorization.

2105121050449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959714.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 2105121050449 in words is "two trillion, one hundred five billion, one hundred twenty-one million, fifty thousand, four hundred forty-nine".