212100020000111 has 4 divisors (see below), whose sum is σ = 212100049223424. Its totient is φ = 212099990776800.

The previous prime is 212100020000009. The next prime is 212100020000119. The reversal of 212100020000111 is 111000020001212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212100020000111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100020000092 and 212100020000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100020000119) 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, 5530706 + ... + 21325776.

It is an arithmetic number, because the mean of its divisors is an integer number (53025012305856).

Almost surely, 2^{212100020000111} is an apocalyptic number.

212100020000111 is a deficient number, since it is larger than the sum of its proper divisors (29223313).

212100020000111 is a wasteful number, since it uses less digits than its factorization.

212100020000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29223312.

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

Adding to 212100020000111 its reverse (111000020001212), we get a palindrome (323100040001323).

The spelling of 212100020000111 in words is "two hundred twelve trillion, one hundred billion, twenty million, one hundred eleven", and thus it is an aban number.