1221332332 has 48 divisors (see below), whose sum is σ = 2453068800. Its totient is φ = 526890560.

The previous prime is 1221332263. The next prime is 1221332339. The reversal of 1221332332 is 2332331221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1221332339) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 67173 + ... + 83395.

It is an arithmetic number, because the mean of its divisors is an integer number (51105600).

Almost surely, 2^1221332332 is an apocalyptic number.

It is an amenable number.

1221332332 is an abundant number, since it is smaller than the sum of its proper divisors (1231736468).

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

1221332332 is a wasteful number, since it uses less digits than its factorization.

1221332332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16326 (or 16324 counting only the distinct ones).

The product of its digits is 1296, while the sum is 22.

The square root of 1221332332 is about 34947.5654659949. The cubic root of 1221332332 is about 1068.9185603202.

Adding to 1221332332 its reverse (2332331221), we get a palindrome (3553663553).

The spelling of 1221332332 in words is "one billion, two hundred twenty-one million, three hundred thirty-two thousand, three hundred thirty-two".