1220112020 has 24 divisors (see below), whose sum is σ = 2577585024. Its totient is φ = 485121056.

The previous prime is 1220112013. The next prime is 1220112029. The reversal of 1220112020 is 202110221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220111992 and 1220112010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179312 + ... + 185991.

It is an arithmetic number, because the mean of its divisors is an integer number (107399376).

Almost surely, 2^1220112020 is an apocalyptic number.

1220112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220112020 is an abundant number, since it is smaller than the sum of its proper divisors (1357473004).

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

1220112020 is a wasteful number, since it uses less digits than its factorization.

1220112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365479 (or 365477 counting only the distinct ones).

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

The square root of 1220112020 is about 34930.1019179733. The cubic root of 1220112020 is about 1068.5624331645.

Adding to 1220112020 its reverse (202110221), we get a palindrome (1422222241).

The spelling of 1220112020 in words is "one billion, two hundred twenty million, one hundred twelve thousand, twenty".