2105544052123 has 2 divisors, whose sum is σ = 2105544052124. Its totient is φ = 2105544052122.

The previous prime is 2105544052043. The next prime is 2105544052147. The reversal of 2105544052123 is 3212504455012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105544052123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105544052153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052772026061 + 1052772026062.

It is an arithmetic number, because the mean of its divisors is an integer number (1052772026062).

Almost surely, 2^{2105544052123} is an apocalyptic number.

2105544052123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105544052123 is an equidigital number, since it uses as much as digits as its factorization.

2105544052123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 2105544052123 in words is "two trillion, one hundred five billion, five hundred forty-four million, fifty-two thousand, one hundred twenty-three".