10201020191 has 8 divisors (see below), whose sum is σ = 10645931904. Its totient is φ = 9756224280.

The previous prime is 10201020157. The next prime is 10201020197. The reversal of 10201020191 is 19102010201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10201020191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201020197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184700 + ... + 233486.

It is an arithmetic number, because the mean of its divisors is an integer number (1330741488).

Almost surely, 2^10201020191 is an apocalyptic number.

10201020191 is a deficient number, since it is larger than the sum of its proper divisors (444911713).

10201020191 is an equidigital number, since it uses as much as digits as its factorization.

10201020191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57901.

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

Adding to 10201020191 its reverse (19102010201), we get a palindrome (29303030392).

The spelling of 10201020191 in words is "ten billion, two hundred one million, twenty thousand, one hundred ninety-one".