111020210021220 has 192 divisors, whose sum is σ = 322033727877120. Its totient is φ = 28543836851712.

The previous prime is 111020210021209. The next prime is 111020210021243. The reversal of 111020210021220 is 22120012020111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111020210021220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3717636009 + ... + 3717665871.

It is an arithmetic number, because the mean of its divisors is an integer number (1677258999360).

Almost surely, 2^{111020210021220} is an apocalyptic number.

111020210021220 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 111020210021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161016863938560).

111020210021220 is an abundant number, since it is smaller than the sum of its proper divisors (211013517855900).

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

111020210021220 is a wasteful number, since it uses less digits than its factorization.

111020210021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32874 (or 32872 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111020210021220 its reverse (22120012020111), we get a palindrome (133140222041331).

The spelling of 111020210021220 in words is "one hundred eleven trillion, twenty billion, two hundred ten million, twenty-one thousand, two hundred twenty".