1221020322 has 8 divisors (see below), whose sum is σ = 2442040656. Its totient is φ = 407006772.

The previous prime is 1221020279. The next prime is 1221020327. The reversal of 1221020322 is 2230201221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1221020322 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1221020327) 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, 101751688 + ... + 101751699.

It is an arithmetic number, because the mean of its divisors is an integer number (305255082).

Almost surely, 2^1221020322 is an apocalyptic number.

1221020322 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221020322 is a wasteful number, since it uses less digits than its factorization.

1221020322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203503392.

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

The square root of 1221020322 is about 34943.1012075345. The cubic root of 1221020322 is about 1068.8275281265.

Adding to 1221020322 its reverse (2230201221), we get a palindrome (3451221543).

The spelling of 1221020322 in words is "one billion, two hundred twenty-one million, twenty thousand, three hundred twenty-two".