111011212211020 has 96 divisors (see below), whose sum is σ = 255055405602816. Its totient is φ = 40250481657600.

The previous prime is 111011212210991. The next prime is 111011212211059. The reversal of 111011212211020 is 20112212110111.

It is a junction number, because it is equal to n+sod(n) for n = 111011212210985 and 111011212211003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459532065 + ... + 459773575.

It is an arithmetic number, because the mean of its divisors is an integer number (2656827141696).

Almost surely, 2^{111011212211020} is an apocalyptic number.

111011212211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111011212211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127527702801408).

111011212211020 is an abundant number, since it is smaller than the sum of its proper divisors (144044193391796).

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

111011212211020 is a wasteful number, since it uses less digits than its factorization.

111011212211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247591 (or 247589 counting only the distinct ones).

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

Adding to 111011212211020 its reverse (20112212110111), we get a palindrome (131123424321131).

It can be divided in two parts, 11101 and 1212211020, that added together give a palindrome (1212222121).

The spelling of 111011212211020 in words is "one hundred eleven trillion, eleven billion, two hundred twelve million, two hundred eleven thousand, twenty".