111100202020111 has 4 divisors (see below), whose sum is σ = 117635508021312. Its totient is φ = 104564896018912.

The previous prime is 111100202020063. The next prime is 111100202020147. The reversal of 111100202020111 is 111020202001111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100202020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111100202020091 and 111100202020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100202020711) 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, 3267653000575 + ... + 3267653000608.

It is an arithmetic number, because the mean of its divisors is an integer number (29408877005328).

Almost surely, 2^{111100202020111} is an apocalyptic number.

111100202020111 is a deficient number, since it is larger than the sum of its proper divisors (6535306001201).

111100202020111 is an equidigital number, since it uses as much as digits as its factorization.

111100202020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6535306001200.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111100202020111 its reverse (111020202001111), we get a palindrome (222120404021222).

The spelling of 111100202020111 in words is "one hundred eleven trillion, one hundred billion, two hundred two million, twenty thousand, one hundred eleven".