2105443306997 has 2 divisors, whose sum is σ = 2105443306998. Its totient is φ = 2105443306996.

The previous prime is 2105443306987. The next prime is 2105443307039. The reversal of 2105443306997 is 7996033445012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1939114735441 + 166328571556 = 1392521^2 + 407834^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105443306997 - 2⁶ = 2105443306933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105443306907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052721653498 + 1052721653499.

It is an arithmetic number, because the mean of its divisors is an integer number (1052721653499).

Almost surely, 2^{2105443306997} is an apocalyptic number.

It is an amenable number.

2105443306997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105443306997 is an equidigital number, since it uses as much as digits as its factorization.

2105443306997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 2105443306997 in words is "two trillion, one hundred five billion, four hundred forty-three million, three hundred six thousand, nine hundred ninety-seven".