111141220 has 12 divisors (see below), whose sum is σ = 233396604. Its totient is φ = 44456480.

The previous prime is 111141209. The next prime is 111141269. The reversal of 111141220 is 22141111.

It can be written as a sum of positive squares in 2 ways, for example, as 67765824 + 43375396 = 8232^2 + 6586^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111141220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2778511 + ... + 2778550.

It is an arithmetic number, because the mean of its divisors is an integer number (19449717).

Almost surely, 2^111141220 is an apocalyptic number.

111141220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111141220 is an abundant number, since it is smaller than the sum of its proper divisors (122255384).

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

111141220 is a wasteful number, since it uses less digits than its factorization.

111141220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557070 (or 5557068 counting only the distinct ones).

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

The square root of 111141220 is about 10542.3536271556. The cubic root of 111141220 is about 480.7932773794.

Adding to 111141220 its reverse (22141111), we get a palindrome (133282331).

The spelling of 111141220 in words is "one hundred eleven million, one hundred forty-one thousand, two hundred twenty".