1220214321 has 32 divisors (see below), whose sum is σ = 1917717120. Its totient is φ = 764163072.

The previous prime is 1220214319. The next prime is 1220214337. The reversal of 1220214321 is 1234120221.

It is a happy number.

It is not a de Polignac number, because 1220214321 - 2¹ = 1220214319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220214294 and 1220214303.

It is not an unprimeable number, because it can be changed into a prime (1220214301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269946 + ... + 274428.

It is an arithmetic number, because the mean of its divisors is an integer number (59928660).

Almost surely, 2^1220214321 is an apocalyptic number.

It is an amenable number.

1220214321 is a deficient number, since it is larger than the sum of its proper divisors (697502799).

1220214321 is a wasteful number, since it uses less digits than its factorization.

1220214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102 (or 5096 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1220214321 is about 34931.5662546070. The cubic root of 1220214321 is about 1068.5922970755.

Adding to 1220214321 its reverse (1234120221), we get a palindrome (2454334542).

The spelling of 1220214321 in words is "one billion, two hundred twenty million, two hundred fourteen thousand, three hundred twenty-one".