1220330221 has 8 divisors (see below), whose sum is σ = 1374213888. Its totient is φ = 1073604000.

The previous prime is 1220330213. The next prime is 1220330311.

1220330221 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1220330221 - 2³ = 1220330213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220330195 and 1220330204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220330201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1789000 + ... + 1789681.

It is an arithmetic number, because the mean of its divisors is an integer number (171776736).

Almost surely, 2^1220330221 is an apocalyptic number.

1220330221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220330221 is a deficient number, since it is larger than the sum of its proper divisors (153883667).

1220330221 is a wasteful number, since it uses less digits than its factorization.

1220330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578723.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220330221 is about 34933.2251731786. The cubic root of 1220330221 is about 1068.6261288169.

It can be divided in two parts, 12203 and 30221, that added together give a palindrome (42424).

The spelling of 1220330221 in words is "one billion, two hundred twenty million, three hundred thirty thousand, two hundred twenty-one".