1220131224 has 96 divisors (see below), whose sum is σ = 3572150400. Its totient is φ = 374008320.

The previous prime is 1220131223. The next prime is 1220131267. The reversal of 1220131224 is 4221310221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1220131197 and 1220131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220131223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260697 + ... + 265335.

It is an arithmetic number, because the mean of its divisors is an integer number (37209900).

Almost surely, 2^1220131224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220131224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1786075200).

1220131224 is an abundant number, since it is smaller than the sum of its proper divisors (2352019176).

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

1220131224 is a wasteful number, since it uses less digits than its factorization.

1220131224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945 (or 4938 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1220131224 is about 34930.3768087320. The cubic root of 1220131224 is about 1068.5680393615.

Adding to 1220131224 its reverse (4221310221), we get a palindrome (5441441445).

The spelling of 1220131224 in words is "one billion, two hundred twenty million, one hundred thirty-one thousand, two hundred twenty-four".