10102020191 has 2 divisors, whose sum is σ = 10102020192. Its totient is φ = 10102020190.

The previous prime is 10102020151. The next prime is 10102020239. The reversal of 10102020191 is 19102020101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10102020191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10102020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051010095 + 5051010096.

It is an arithmetic number, because the mean of its divisors is an integer number (5051010096).

Almost surely, 2^10102020191 is an apocalyptic number.

10102020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102020191 is an equidigital number, since it uses as much as digits as its factorization.

10102020191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 10102020191 its reverse (19102020101), we get a palindrome (29204040292).

It can be divided in two parts, 10 and 102020191, that added together give a palindrome (102020201).

The spelling of 10102020191 in words is "ten billion, one hundred two million, twenty thousand, one hundred ninety-one".