20111201111101 has 4 divisors (see below), whose sum is σ = 20111365204704. Its totient is φ = 20111037017500.

The previous prime is 20111201111059. The next prime is 20111201111117. The reversal of 20111201111101 is 10111110211102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20111201111101 - 2⁹ = 20111201110589 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 (20111201111191) 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, 81862825 + ... + 82108126.

It is an arithmetic number, because the mean of its divisors is an integer number (5027841301176).

Almost surely, 2^{20111201111101} is an apocalyptic number.

It is an amenable number.

20111201111101 is a deficient number, since it is larger than the sum of its proper divisors (164093603).

20111201111101 is a wasteful number, since it uses less digits than its factorization.

20111201111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164093602.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 20111201111101 its reverse (10111110211102), we get a palindrome (30222311322203).

The spelling of 20111201111101 in words is "twenty trillion, one hundred eleven billion, two hundred one million, one hundred eleven thousand, one hundred one".