1012102020191 has 2 divisors, whose sum is σ = 1012102020192. Its totient is φ = 1012102020190.

The previous prime is 1012102020151. The next prime is 1012102020247. The reversal of 1012102020191 is 1910202012101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012102020191 - 2³⁸ = 737224113247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012102020101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506051010095 + 506051010096.

It is an arithmetic number, because the mean of its divisors is an integer number (506051010096).

Almost surely, 2^{1012102020191} is an apocalyptic number.

1012102020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012102020191 is an equidigital number, since it uses as much as digits as its factorization.

1012102020191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1012102020191 its reverse (1910202012101), we get a palindrome (2922304032292).

The spelling of 1012102020191 in words is "one trillion, twelve billion, one hundred two million, twenty thousand, one hundred ninety-one".