20101200197 has 48 divisors (see below), whose sum is σ = 23792693760. Its totient is φ = 16903351296.

The previous prime is 20101200179. The next prime is 20101200241. The reversal of 20101200197 is 79100210102.

It is not a de Polignac number, because 20101200197 - 2⁸ = 20101199941 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 (20101200107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27956804 + ... + 27957522.

It is an arithmetic number, because the mean of its divisors is an integer number (495681120).

Almost surely, 2^20101200197 is an apocalyptic number.

It is an amenable number.

20101200197 is a deficient number, since it is larger than the sum of its proper divisors (3691493563).

20101200197 is a wasteful number, since it uses less digits than its factorization.

20101200197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 20101200197 its reverse (79100210102), we get a palindrome (99201410299).

The spelling of 20101200197 in words is "twenty billion, one hundred one million, two hundred thousand, one hundred ninety-seven".