1220321132 has 24 divisors (see below), whose sum is σ = 2380195440. Its totient is φ = 544043520.

The previous prime is 1220321101. The next prime is 1220321177. The reversal of 1220321132 is 2311230221.

It is a super-2 number, since 2×1220321132² = 2978367330411522848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1220321132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470969 + ... + 473552.

It is an arithmetic number, because the mean of its divisors is an integer number (99174810).

Almost surely, 2^1220321132 is an apocalyptic number.

It is an amenable number.

1220321132 is a deficient number, since it is larger than the sum of its proper divisors (1159874308).

1220321132 is a wasteful number, since it uses less digits than its factorization.

1220321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944561 (or 944559 counting only the distinct ones).

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

The square root of 1220321132 is about 34933.0950818847. The cubic root of 1220321132 is about 1068.6234757736.

Adding to 1220321132 its reverse (2311230221), we get a palindrome (3531551353).

The spelling of 1220321132 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred thirty-two".