20101111197 has 8 divisors (see below), whose sum is σ = 27307170144. Its totient is φ = 13147896528.

The previous prime is 20101111183. The next prime is 20101111213. The reversal of 20101111197 is 79111110102.

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

It is not a de Polignac number, because 20101111197 - 2²² = 20096916893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101112197) 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, 63210883 + ... + 63211200.

It is an arithmetic number, because the mean of its divisors is an integer number (3413396268).

Almost surely, 2^20101111197 is an apocalyptic number.

It is an amenable number.

20101111197 is a deficient number, since it is larger than the sum of its proper divisors (7206058947).

20101111197 is a wasteful number, since it uses less digits than its factorization.

20101111197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126422139.

The product of its (nonzero) digits is 126, while the sum is 24.

Adding to 20101111197 its reverse (79111110102), we get a palindrome (99212221299).

The spelling of 20101111197 in words is "twenty billion, one hundred one million, one hundred eleven thousand, one hundred ninety-seven".