111100211102020 has 72 divisors (see below), whose sum is σ = 271450797221016. Its totient is φ = 38084644394496.

The previous prime is 111100211102017. The next prime is 111100211102051. The reversal of 111100211102020 is 20201112001111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5743576523776 + 105356634578244 = 2396576^2 + 10264338^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4754569 + ... + 15646288.

It is an arithmetic number, because the mean of its divisors is an integer number (3770149961403).

Almost surely, 2^{111100211102020} is an apocalyptic number.

111100211102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100211102020 is an abundant number, since it is smaller than the sum of its proper divisors (160350586118996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111100211102020 is a wasteful number, since it uses less digits than its factorization.

111100211102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406437 (or 20406428 counting only the distinct ones).

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

Adding to 111100211102020 its reverse (20201112001111), we get a palindrome (131301323103131).

The spelling of 111100211102020 in words is "one hundred eleven trillion, one hundred billion, two hundred eleven million, one hundred two thousand, twenty".