111012120220 has 24 divisors (see below), whose sum is σ = 233985705408. Its totient is φ = 44240990400.

The previous prime is 111012120217. The next prime is 111012120221. The reversal of 111012120220 is 22021210111.

It is a self number, because there is not a number n which added to its sum of digits gives 111012120220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012120221) 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 7 ways as a sum of consecutive naturals, for example, 10235551 + ... + 10246390.

It is an arithmetic number, because the mean of its divisors is an integer number (9749404392).

Almost surely, 2^111012120220 is an apocalyptic number.

111012120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012120220 is an abundant number, since it is smaller than the sum of its proper divisors (122973585188).

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

111012120220 is a wasteful number, since it uses less digits than its factorization.

111012120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20482221 (or 20482219 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111012120220 its reverse (22021210111), we get a palindrome (133033330331).

The spelling of 111012120220 in words is "one hundred eleven billion, twelve million, one hundred twenty thousand, two hundred twenty".