1220021232 has 40 divisors (see below), whose sum is σ = 3163737984. Its totient is φ = 405123264.

The previous prime is 1220021203. The next prime is 1220021249. The reversal of 1220021232 is 2321200221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35698 + ... + 60945.

Almost surely, 2^1220021232 is an apocalyptic number.

1220021232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220021232 is an abundant number, since it is smaller than the sum of its proper divisors (1943716752).

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

1220021232 is a wasteful number, since it uses less digits than its factorization.

1220021232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96917 (or 96911 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1220021232 is about 34928.8023270195. The cubic root of 1220021232 is about 1068.5359287531.

Adding to 1220021232 its reverse (2321200221), we get a palindrome (3541221453).

The spelling of 1220021232 in words is "one billion, two hundred twenty million, twenty-one thousand, two hundred thirty-two".