1221102102212 has 24 divisors (see below), whose sum is σ = 2151130591680. Its totient is φ = 606498144480.

The previous prime is 1221102102211. The next prime is 1221102102221. The reversal of 1221102102212 is 2122012011221.

It is not an unprimeable number, because it can be changed into a prime (1221102102211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425714 + ... + 1619702.

It is an arithmetic number, because the mean of its divisors is an integer number (89630441320).

Almost surely, 2^{1221102102212} is an apocalyptic number.

It is an amenable number.

1221102102212 is a deficient number, since it is larger than the sum of its proper divisors (930028489468).

1221102102212 is a wasteful number, since it uses less digits than its factorization.

1221102102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195691 (or 1195689 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221102102212 its reverse (2122012011221), we get a palindrome (3343114113433).

Subtracting 1221102102212 from its reverse (2122012011221), we obtain a palindrome (900909909009).

The spelling of 1221102102212 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred two thousand, two hundred twelve".