1020109208191 has 2 divisors, whose sum is σ = 1020109208192. Its totient is φ = 1020109208190.

The previous prime is 1020109208147. The next prime is 1020109208201. The reversal of 1020109208191 is 1918029010201.

It is a strong prime.

It is an emirp because it is prime and its reverse (1918029010201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020109208191 - 2²³ = 1020100819583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020109208101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510054604095 + 510054604096.

It is an arithmetic number, because the mean of its divisors is an integer number (510054604096).

Almost surely, 2^{1020109208191} is an apocalyptic number.

1020109208191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020109208191 is an equidigital number, since it uses as much as digits as its factorization.

1020109208191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 1020109208191 in words is "one trillion, twenty billion, one hundred nine million, two hundred eight thousand, one hundred ninety-one".