1220112120 has 32 divisors (see below), whose sum is σ = 3660336720. Its totient is φ = 325363200.

The previous prime is 1220112109. The next prime is 1220112121. The reversal of 1220112120 is 212110221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220112096 and 1220112105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083681 + ... + 5083920.

Almost surely, 2^1220112120 is an apocalyptic number.

1220112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220112120 is an abundant number, since it is smaller than the sum of its proper divisors (2440224600).

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

1220112120 is a wasteful number, since it uses less digits than its factorization.

1220112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167615 (or 10167611 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1220112120 is about 34930.1033494034. The cubic root of 1220112120 is about 1068.5624623575.

Adding to 1220112120 its reverse (212110221), we get a palindrome (1432222341).

The spelling of 1220112120 in words is "one billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty".