1220020112 has 10 divisors (see below), whose sum is σ = 2363788998. Its totient is φ = 610010048.

The previous prime is 1220020093. The next prime is 1220020121. The reversal of 1220020112 is 2110200221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 896164096 + 323856016 = 29936^2 + 17996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220020093 and 1220020102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38125613 + ... + 38125644.

Almost surely, 2^1220020112 is an apocalyptic number.

It is an amenable number.

1220020112 is a deficient number, since it is larger than the sum of its proper divisors (1143768886).

1220020112 is an equidigital number, since it uses as much as digits as its factorization.

1220020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76251265 (or 76251259 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1220020112 is about 34928.7862944019. The cubic root of 1220020112 is about 1068.5356017751.

Adding to 1220020112 its reverse (2110200221), we get a palindrome (3330220333).

The spelling of 1220020112 in words is "one billion, two hundred twenty million, twenty thousand, one hundred twelve".