1200320220 has 48 divisors (see below), whose sum is σ = 3666434688. Its totient is φ = 290986560.

The previous prime is 1200320201. The next prime is 1200320221. The reversal of 1200320220 is 220230021.

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 = 1200320196 and 1200320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200320221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908674 + ... + 909993.

It is an arithmetic number, because the mean of its divisors is an integer number (76384056).

Almost surely, 2^1200320220 is an apocalyptic number.

1200320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200320220 is an abundant number, since it is smaller than the sum of its proper divisors (2466114468).

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

1200320220 is a wasteful number, since it uses less digits than its factorization.

1200320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818690 (or 1818688 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1200320220 is about 34645.6378206550. The cubic root of 1200320220 is about 1062.7530842557.

Adding to 1200320220 its reverse (220230021), we get a palindrome (1420550241).

It can be divided in two parts, 12003 and 20220, that added together give a palindrome (32223).

The spelling of 1200320220 in words is "one billion, two hundred million, three hundred twenty thousand, two hundred twenty".