1221120102212 has 12 divisors (see below), whose sum is σ = 2136990555840. Its totient is φ = 610551371976.

The previous prime is 1221120102193. The next prime is 1221120102221. The reversal of 1221120102212 is 2122010211221.

It is a super-2 number, since 2×1221120102212² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847912 + ... + 2420127.

It is an arithmetic number, because the mean of its divisors is an integer number (178082546320).

Almost surely, 2^{1221120102212} is an apocalyptic number.

It is an amenable number.

1221120102212 is a deficient number, since it is larger than the sum of its proper divisors (915870453628).

1221120102212 is a wasteful number, since it uses less digits than its factorization.

1221120102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4339570 (or 4339568 counting only the distinct ones).

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

Adding to 1221120102212 its reverse (2122010211221), we get a palindrome (3343130313433).

The spelling of 1221120102212 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred twelve".