1220130221 has 8 divisors (see below), whose sum is σ = 1230645504. Its totient is φ = 1209660480.

The previous prime is 1220130217. The next prime is 1220130227. The reversal of 1220130221 is 1220310221.

It is a happy number.

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 1220130221 - 2² = 1220130217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220130196 and 1220130205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220130227) 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 7 ways as a sum of consecutive naturals, for example, 43556 + ... + 65858.

It is an arithmetic number, because the mean of its divisors is an integer number (153830688).

Almost surely, 2^1220130221 is an apocalyptic number.

It is an amenable number.

1220130221 is a deficient number, since it is larger than the sum of its proper divisors (10515283).

1220130221 is a wasteful number, since it uses less digits than its factorization.

1220130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22771.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220130221 is about 34930.3624515979. The cubic root of 1220130221 is about 1068.5677465586.

Adding to 1220130221 its reverse (1220310221), we get a palindrome (2440440442).

The spelling of 1220130221 in words is "one billion, two hundred twenty million, one hundred thirty thousand, two hundred twenty-one".