1210222221 has 8 divisors (see below), whose sum is σ = 1737755040. Its totient is φ = 744752112.

The previous prime is 1210222217. The next prime is 1210222259. The reversal of 1210222221 is 1222220121.

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

It is not a de Polignac number, because 1210222221 - 2² = 1210222217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15515631 + ... + 15515708.

It is an arithmetic number, because the mean of its divisors is an integer number (217219380).

Almost surely, 2^1210222221 is an apocalyptic number.

It is an amenable number.

1210222221 is a deficient number, since it is larger than the sum of its proper divisors (527532819).

1210222221 is a wasteful number, since it uses less digits than its factorization.

1210222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31031355.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1210222221 is about 34788.2483174994. The cubic root of 1210222221 is about 1065.6674667115.

Adding to 1210222221 its reverse (1222220121), we get a palindrome (2432442342).

The spelling of 1210222221 in words is "one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".