20012100020111 has 8 divisors (see below), whose sum is σ = 20016584486160. Its totient is φ = 20007615912768.

The previous prime is 20012100020093. The next prime is 20012100020137. The reversal of 20012100020111 is 11102000121002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012100020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012100020092 and 20012100020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012100020161) 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, 132960080 + ... + 133110506.

It is an arithmetic number, because the mean of its divisors is an integer number (2502073060770).

Almost surely, 2^{20012100020111} is an apocalyptic number.

20012100020111 is a deficient number, since it is larger than the sum of its proper divisors (4484466049).

20012100020111 is a wasteful number, since it uses less digits than its factorization.

20012100020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179353.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20012100020111 its reverse (11102000121002), we get a palindrome (31114100141113).

The spelling of 20012100020111 in words is "twenty trillion, twelve billion, one hundred million, twenty thousand, one hundred eleven".