1222220212 has 6 divisors (see below), whose sum is σ = 2138885378. Its totient is φ = 611110104.

The previous prime is 1222220183. The next prime is 1222220249. The reversal of 1222220212 is 2120222221.

It can be written as a sum of positive squares in only one way, i.e., 874621476 + 347598736 = 29574^2 + 18644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152777523 + ... + 152777530.

Almost surely, 2^1222220212 is an apocalyptic number.

It is an amenable number.

1222220212 is a deficient number, since it is larger than the sum of its proper divisors (916665166).

1222220212 is a wasteful number, since it uses less digits than its factorization.

1222220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305555057 (or 305555055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1222220212 is about 34960.2661889180. The cubic root of 1222220212 is about 1069.1775238295.

Adding to 1222220212 its reverse (2120222221), we get a palindrome (3342442433).

The spelling of 1222220212 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twelve".