1221102222212 has 12 divisors (see below), whose sum is σ = 2158086601356. Its totient is φ = 604506050400.

The previous prime is 1221102222203. The next prime is 1221102222239. The reversal of 1221102222212 is 2122222011221.

It can be written as a sum of positive squares in 2 ways, for example, as 1020233324356 + 200868897856 = 1010066^2 + 448184^2 .

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, 1511264723 + ... + 1511265530.

It is an arithmetic number, because the mean of its divisors is an integer number (179840550113).

Almost surely, 2^{1221102222212} is an apocalyptic number.

It is an amenable number.

1221102222212 is a deficient number, since it is larger than the sum of its proper divisors (936984379144).

1221102222212 is a wasteful number, since it uses less digits than its factorization.

1221102222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022530358 (or 3022530356 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221102222212 its reverse (2122222011221), we get a palindrome (3343324233433).

The spelling of 1221102222212 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, two hundred twelve".