1221332132 has 6 divisors (see below), whose sum is σ = 2137331238. Its totient is φ = 610666064.

The previous prime is 1221332111. The next prime is 1221332153. The reversal of 1221332132 is 2312331221.

It is an interprime number because it is at equal distance from previous prime (1221332111) and next prime (1221332153).

It can be written as a sum of positive squares in only one way, i.e., 1168682596 + 52649536 = 34186^2 + 7256^2 .

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 as a sum of consecutive naturals, namely, 152666513 + ... + 152666520.

It is an arithmetic number, because the mean of its divisors is an integer number (356221873).

Almost surely, 2^1221332132 is an apocalyptic number.

It is an amenable number.

1221332132 is a deficient number, since it is larger than the sum of its proper divisors (915999106).

1221332132 is a wasteful number, since it uses less digits than its factorization.

1221332132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305333037 (or 305333035 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1221332132 is about 34947.5626045651. The cubic root of 1221332132 is about 1068.9185019731.

Adding to 1221332132 its reverse (2312331221), we get a palindrome (3533663353).

The spelling of 1221332132 in words is "one billion, two hundred twenty-one million, three hundred thirty-two thousand, one hundred thirty-two".