1321220132 has 12 divisors (see below), whose sum is σ = 2312484636. Its totient is φ = 660510240.

The previous prime is 1321220123. The next prime is 1321220143. The reversal of 1321220132 is 2310221231.

It can be written as a sum of positive squares in 2 ways, for example, as 716847076 + 604373056 = 26774^2 + 24584^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321220132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10382 + ... + 52442.

It is an arithmetic number, because the mean of its divisors is an integer number (192707053).

Almost surely, 2^1321220132 is an apocalyptic number.

It is an amenable number.

1321220132 is a deficient number, since it is larger than the sum of its proper divisors (991264504).

1321220132 is a wasteful number, since it uses less digits than its factorization.

1321220132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49918 (or 49916 counting only the distinct ones).

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

The square root of 1321220132 is about 36348.5918846934. The cubic root of 1321220132 is about 1097.2991956930.

Adding to 1321220132 its reverse (2310221231), we get a palindrome (3631441363).

The spelling of 1321220132 in words is "one billion, three hundred twenty-one million, two hundred twenty thousand, one hundred thirty-two".