1200120220 has 48 divisors (see below), whose sum is σ = 2832137280. Its totient is φ = 423853056.

The previous prime is 1200120217. The next prime is 1200120223. The reversal of 1200120220 is 220210021.

It is an interprime number because it is at equal distance from previous prime (1200120217) and next prime (1200120223).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1200120197 and 1200120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200120223) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 94365 + ... + 106324.

It is an arithmetic number, because the mean of its divisors is an integer number (59002860).

Almost surely, 2^1200120220 is an apocalyptic number.

1200120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200120220 is an abundant number, since it is smaller than the sum of its proper divisors (1632017060).

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

1200120220 is a wasteful number, since it uses less digits than its factorization.

1200120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200734 (or 200732 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1200120220 is about 34642.7513341536. The cubic root of 1200120220 is about 1062.6940548902.

Adding to 1200120220 its reverse (220210021), we get a palindrome (1420330241).

The spelling of 1200120220 in words is "one billion, two hundred million, one hundred twenty thousand, two hundred twenty".