191020102001 has 8 divisors (see below), whose sum is σ = 208007371200. Its totient is φ = 174726190800.

The previous prime is 191020101997. The next prime is 191020102019. The reversal of 191020102001 is 100201020191.

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

It is a cyclic number.

It is not a de Polignac number, because 191020102001 - 2² = 191020101997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191020102051) 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, 173338925 + ... + 173340026.

It is an arithmetic number, because the mean of its divisors is an integer number (26000921400).

Almost surely, 2^191020102001 is an apocalyptic number.

It is an amenable number.

191020102001 is a deficient number, since it is larger than the sum of its proper divisors (16987269199).

191020102001 is a wasteful number, since it uses less digits than its factorization.

191020102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346678999.

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

Adding to 191020102001 its reverse (100201020191), we get a palindrome (291221122192).

The spelling of 191020102001 in words is "one hundred ninety-one billion, twenty million, one hundred two thousand, one".