1221210332 has 12 divisors (see below), whose sum is σ = 2249598120. Its totient is φ = 578468016.

The previous prime is 1221210307. The next prime is 1221210337. The reversal of 1221210332 is 2330121221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221210332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210337) 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 3 ways as a sum of consecutive naturals, for example, 8034203 + ... + 8034354.

It is an arithmetic number, because the mean of its divisors is an integer number (187466510).

Almost surely, 2^1221210332 is an apocalyptic number.

It is an amenable number.

1221210332 is a deficient number, since it is larger than the sum of its proper divisors (1028387788).

1221210332 is a wasteful number, since it uses less digits than its factorization.

1221210332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16068580 (or 16068578 counting only the distinct ones).

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

The square root of 1221210332 is about 34945.8199503174. The cubic root of 1221210332 is about 1068.8829673853.

Adding to 1221210332 its reverse (2330121221), we get a palindrome (3551331553).

The spelling of 1221210332 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, three hundred thirty-two".