1220122321 has 16 divisors (see below), whose sum is σ = 1365336000. Its totient is φ = 1080697600.

The previous prime is 1220122313. The next prime is 1220122333. The reversal of 1220122321 is 1232210221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220122321 - 2³ = 1220122313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220122295 and 1220122304.

It is not an unprimeable number, because it can be changed into a prime (1220122361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471810 + ... + 474388.

It is an arithmetic number, because the mean of its divisors is an integer number (85333500).

Almost surely, 2^1220122321 is an apocalyptic number.

1220122321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220122321 is a deficient number, since it is larger than the sum of its proper divisors (145213679).

1220122321 is a wasteful number, since it uses less digits than its factorization.

1220122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1220122321 is about 34930.2493692788. The cubic root of 1220122321 is about 1068.5654403284.

Adding to 1220122321 its reverse (1232210221), we get a palindrome (2452332542).

The spelling of 1220122321 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, three hundred twenty-one".