1220002221 has 8 divisors (see below), whose sum is σ = 1670633824. Its totient is φ = 791352720.

The previous prime is 1220002219. The next prime is 1220002237. The reversal of 1220002221 is 1222000221.

1220002221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1220002221 - 2¹ = 1220002219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220002197 and 1220002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002261) 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, 5495395 + ... + 5495616.

It is an arithmetic number, because the mean of its divisors is an integer number (208829228).

Almost surely, 2^1220002221 is an apocalyptic number.

It is an amenable number.

1220002221 is a deficient number, since it is larger than the sum of its proper divisors (450631603).

1220002221 is a wasteful number, since it uses less digits than its factorization.

1220002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10991051.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220002221 is about 34928.5301866540. The cubic root of 1220002221 is about 1068.5303785650.

Adding to 1220002221 its reverse (1222000221), we get a palindrome (2442002442).

The spelling of 1220002221 in words is "one billion, two hundred twenty million, two thousand, two hundred twenty-one".