1222220100212 has 12 divisors (see below), whose sum is σ = 2145232018020. Its totient is φ = 609296666496.

The previous prime is 1222220100209. The next prime is 1222220100229. The reversal of 1222220100212 is 2120010222221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 818796955876 + 403423144336 = 904874^2 + 635156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453344387 + ... + 453347082.

It is an arithmetic number, because the mean of its divisors is an integer number (178769334835).

Almost surely, 2^{1222220100212} is an apocalyptic number.

It is an amenable number.

1222220100212 is a deficient number, since it is larger than the sum of its proper divisors (923011917808).

1222220100212 is a wasteful number, since it uses less digits than its factorization.

1222220100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906691810 (or 906691808 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1222220100212 its reverse (2120010222221), we get a palindrome (3342230322433).

The spelling of 1222220100212 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, one hundred thousand, two hundred twelve".