201021100001197 has 32 divisors (see below), whose sum is σ = 243599254198272. Its totient is φ = 162156122783424.

The previous prime is 201021100001153. The next prime is 201021100001251. The reversal of 201021100001197 is 791100001120102.

It is not a de Polignac number, because 201021100001197 - 2¹¹ = 201021099999149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021100001107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2346078 + ... + 20187775.

It is an arithmetic number, because the mean of its divisors is an integer number (7612476693696).

Almost surely, 2^{201021100001197} is an apocalyptic number.

It is an amenable number.

201021100001197 is a deficient number, since it is larger than the sum of its proper divisors (42578154197075).

201021100001197 is a wasteful number, since it uses less digits than its factorization.

201021100001197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22534777.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 201021100001197 its reverse (791100001120102), we get a palindrome (992121101121299).

The spelling of 201021100001197 in words is "two hundred one trillion, twenty-one billion, one hundred million, one thousand, one hundred ninety-seven".