1220030021 has 8 divisors (see below), whose sum is σ = 1397096064. Its totient is φ = 1043658000.

The previous prime is 1220030011. The next prime is 1220030039. The reversal of 1220030021 is 1200300221.

It is a happy number.

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

It is not a de Polignac number, because 1220030021 - 2¹⁴ = 1220013637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220029984 and 1220030011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220030011) 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 7 ways as a sum of consecutive naturals, for example, 169730 + ... + 176771.

It is an arithmetic number, because the mean of its divisors is an integer number (174637008).

Almost surely, 2^1220030021 is an apocalyptic number.

It is an amenable number.

1220030021 is a deficient number, since it is larger than the sum of its proper divisors (177066043).

1220030021 is an equidigital number, since it uses as much as digits as its factorization.

1220030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347011.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220030021 is about 34928.9281398671. The cubic root of 1220030021 is about 1068.5384946483.

Adding to 1220030021 its reverse (1200300221), we get a palindrome (2420330242).

It can be divided in two parts, 1 and 220030021, that added together give a palindrome (220030022).

The spelling of 1220030021 in words is "one billion, two hundred twenty million, thirty thousand, twenty-one".