111220988 has 12 divisors (see below), whose sum is σ = 198778272. Its totient is φ = 54427200.

The previous prime is 111220969. The next prime is 111220999. The reversal of 111220988 is 889022111.

It is a super-2 number, since 2×111220988² = 24740216343392288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295613 + ... + 295988.

It is an arithmetic number, because the mean of its divisors is an integer number (16564856).

Almost surely, 2^111220988 is an apocalyptic number.

It is an amenable number.

111220988 is a deficient number, since it is larger than the sum of its proper divisors (87557284).

111220988 is a wasteful number, since it uses less digits than its factorization.

111220988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591652 (or 591650 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 111220988 is about 10546.1361644917. The cubic root of 111220988 is about 480.9082744571.

The spelling of 111220988 in words is "one hundred eleven million, two hundred twenty thousand, nine hundred eighty-eight".