2105198980187 has 2 divisors, whose sum is σ = 2105198980188. Its totient is φ = 2105198980186.

The previous prime is 2105198980123. The next prime is 2105198980201. The reversal of 2105198980187 is 7810898915012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2105198980187 - 2⁶ = 2105198980123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105198980117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052599490093 + 1052599490094.

It is an arithmetic number, because the mean of its divisors is an integer number (1052599490094).

Almost surely, 2^{2105198980187} is an apocalyptic number.

2105198980187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105198980187 is an equidigital number, since it uses as much as digits as its factorization.

2105198980187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 59.

The spelling of 2105198980187 in words is "two trillion, one hundred five billion, one hundred ninety-eight million, nine hundred eighty thousand, one hundred eighty-seven".