100201210020191 has 4 divisors (see below), whose sum is σ = 114515668594512. Its totient is φ = 85886751445872.

The previous prime is 100201210020173. The next prime is 100201210020211. The reversal of 100201210020191 is 191020012102001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100201210020191 - 2⁴² = 95803163509087 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 (100201210010191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7157229287150 + ... + 7157229287163.

It is an arithmetic number, because the mean of its divisors is an integer number (28628917148628).

Almost surely, 2^{100201210020191} is an apocalyptic number.

100201210020191 is a deficient number, since it is larger than the sum of its proper divisors (14314458574321).

100201210020191 is an equidigital number, since it uses as much as digits as its factorization.

100201210020191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14314458574320.

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

Adding to 100201210020191 its reverse (191020012102001), we get a palindrome (291221222122192).

The spelling of 100201210020191 in words is "one hundred trillion, two hundred one billion, two hundred ten million, twenty thousand, one hundred ninety-one".