20012101111111 has 8 divisors (see below), whose sum is σ = 20882250184320. Its totient is φ = 19141956847992.

The previous prime is 20012101111099. The next prime is 20012101111169. The reversal of 20012101111111 is 11111110121002.

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

It is a cyclic number.

It is not a de Polignac number, because 20012101111111 - 2⁷ = 20012101110983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012101111091 and 20012101111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012101112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9222160 + ... + 11183578.

It is an arithmetic number, because the mean of its divisors is an integer number (2610281273040).

Almost surely, 2^{20012101111111} is an apocalyptic number.

20012101111111 is a deficient number, since it is larger than the sum of its proper divisors (870149073209).

20012101111111 is a wasteful number, since it uses less digits than its factorization.

20012101111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405045.

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

Adding to 20012101111111 its reverse (11111110121002), we get a palindrome (31123211232113).

The spelling of 20012101111111 in words is "twenty trillion, twelve billion, one hundred one million, one hundred eleven thousand, one hundred eleven".