111120202111111 has 4 divisors (see below), whose sum is σ = 111123189170224. Its totient is φ = 111117215052000.

The previous prime is 111120202111103. The next prime is 111120202111147. The reversal of 111120202111111 is 111111202021111.

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

It is a cyclic number.

It is not a de Polignac number, because 111120202111111 - 2³ = 111120202111103 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 (111120202111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493473755 + ... + 1493548156.

It is an arithmetic number, because the mean of its divisors is an integer number (27780797292556).

Almost surely, 2^{111120202111111} is an apocalyptic number.

111120202111111 is a deficient number, since it is larger than the sum of its proper divisors (2987059113).

111120202111111 is an equidigital number, since it uses as much as digits as its factorization.

111120202111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987059112.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111120202111111 its reverse (111111202021111), we get a palindrome (222231404132222).

It can be divided in two parts, 1111202021111 and 11, that multiplied together give a palindrome (12223222232221).

The spelling of 111120202111111 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred two million, one hundred eleven thousand, one hundred eleven".