1220021332 has 12 divisors (see below), whose sum is σ = 2162063680. Its totient is φ = 602288856.

The previous prime is 1220021323. The next prime is 1220021351. The reversal of 1220021332 is 2331200221.

It is a congruent number.

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, 1930098 + ... + 1930729.

Almost surely, 2^1220021332 is an apocalyptic number.

It is an amenable number.

1220021332 is a deficient number, since it is larger than the sum of its proper divisors (942042348).

1220021332 is a wasteful number, since it uses less digits than its factorization.

1220021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860910 (or 3860908 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220021332 is about 34928.8037585028. The cubic root of 1220021332 is about 1068.5359579476.

Adding to 1220021332 its reverse (2331200221), we get a palindrome (3551221553).

The spelling of 1220021332 in words is "one billion, two hundred twenty million, twenty-one thousand, three hundred thirty-two".