1222000221 has 32 divisors (see below), whose sum is σ = 1807948800. Its totient is φ = 729298944.

The previous prime is 1222000211. The next prime is 1222000229. The reversal of 1222000221 is 1220002221.

It is not a de Polignac number, because 1222000221 - 2¹⁰ = 1221999197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222000197 and 1222000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222000229) 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 31 ways as a sum of consecutive naturals, for example, 508180 + ... + 510578.

It is an arithmetic number, because the mean of its divisors is an integer number (56498400).

Almost surely, 2^1222000221 is an apocalyptic number.

It is an amenable number.

1222000221 is a deficient number, since it is larger than the sum of its proper divisors (585948579).

1222000221 is a wasteful number, since it uses less digits than its factorization.

1222000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

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

The square root of 1222000221 is about 34957.1197469128. The cubic root of 1222000221 is about 1069.1133718478.

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

It can be divided in two parts, 1222000 and 221, that added together give a palindrome (1222221).

The spelling of 1222000221 in words is "one billion, two hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.