1201224220 has 144 divisors (see below), whose sum is σ = 3092281920. Its totient is φ = 390061056.

The previous prime is 1201224217. The next prime is 1201224257. The reversal of 1201224220 is 224221021.

It is a junction number, because it is equal to n+sod(n) for n = 1201224194 and 1201224203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3087786 + ... + 3088174.

It is an arithmetic number, because the mean of its divisors is an integer number (21474180).

Almost surely, 2^1201224220 is an apocalyptic number.

1201224220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201224220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546140960).

1201224220 is an abundant number, since it is smaller than the sum of its proper divisors (1891057700).

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

1201224220 is a wasteful number, since it uses less digits than its factorization.

1201224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1201224220 is about 34658.6817406548. The cubic root of 1201224220 is about 1063.0198152185.

Adding to 1201224220 its reverse (224221021), we get a palindrome (1425445241).

The spelling of 1201224220 in words is "one billion, two hundred one million, two hundred twenty-four thousand, two hundred twenty".