111211210212020 has 96 divisors (see below), whose sum is σ = 237535848345600. Its totient is φ = 43729683557504.

The previous prime is 111211210212001. The next prime is 111211210212041. The reversal of 111211210212020 is 20212012112111.

It is a self number, because there is not a number n which added to its sum of digits gives 111211210212020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499384337 + ... + 499606983.

It is an arithmetic number, because the mean of its divisors is an integer number (2474331753600).

Almost surely, 2^{111211210212020} is an apocalyptic number.

111211210212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211210212020 is an abundant number, since it is smaller than the sum of its proper divisors (126324638133580).

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

111211210212020 is a wasteful number, since it uses less digits than its factorization.

111211210212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224237 (or 224235 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111211210212020 its reverse (20212012112111), we get a palindrome (131423222324131).

The spelling of 111211210212020 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred ten million, two hundred twelve thousand, twenty".