1220131232 has 96 divisors (see below), whose sum is σ = 2638863360. Its totient is φ = 553512960.

The previous prime is 1220131223. The next prime is 1220131267. The reversal of 1220131232 is 2321310221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220131232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1208744 + ... + 1209752.

It is an arithmetic number, because the mean of its divisors is an integer number (27488160).

Almost surely, 2^1220131232 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 1220131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319431680).

1220131232 is an abundant number, since it is smaller than the sum of its proper divisors (1418732128).

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

1220131232 is a wasteful number, since it uses less digits than its factorization.

1220131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1220131232 is about 34930.3769232455. The cubic root of 1220131232 is about 1068.5680416970.

Adding to 1220131232 its reverse (2321310221), we get a palindrome (3541441453).

The spelling of 1220131232 in words is "one billion, two hundred twenty million, one hundred thirty-one thousand, two hundred thirty-two".