111101210120220 has 48 divisors (see below), whose sum is σ = 311825830861440. Its totient is φ = 29556280553536.

The previous prime is 111101210120129. The next prime is 111101210120221. The reversal of 111101210120220 is 22021012101111.

It is a happy number.

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 111101210120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101210120221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2209625022 + ... + 2209675301.

It is an arithmetic number, because the mean of its divisors is an integer number (6496371476280).

Almost surely, 2^{111101210120220} is an apocalyptic number.

111101210120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101210120220 is an abundant number, since it is smaller than the sum of its proper divisors (200724620741220).

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

111101210120220 is a wasteful number, since it uses less digits than its factorization.

111101210120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419300754 (or 4419300752 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111101210120220 its reverse (22021012101111), we get a palindrome (133122222221331).

The spelling of 111101210120220 in words is "one hundred eleven trillion, one hundred one billion, two hundred ten million, one hundred twenty thousand, two hundred twenty".