1020010100191 has 2 divisors, whose sum is σ = 1020010100192. Its totient is φ = 1020010100190.

The previous prime is 1020010100177. The next prime is 1020010100243. The reversal of 1020010100191 is 1910010100201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020010100191 - 2⁹ = 1020010099679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020010100491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510005050095 + 510005050096.

It is an arithmetic number, because the mean of its divisors is an integer number (510005050096).

Almost surely, 2^{1020010100191} is an apocalyptic number.

1020010100191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020010100191 is an equidigital number, since it uses as much as digits as its factorization.

1020010100191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1020010100191 its reverse (1910010100201), we get a palindrome (2930020200392).

The spelling of 1020010100191 in words is "one trillion, twenty billion, ten million, one hundred thousand, one hundred ninety-one".