1221102210212 has 12 divisors (see below), whose sum is σ = 2229838818816. Its totient is φ = 584005404840.

The previous prime is 1221102210173. The next prime is 1221102210233. The reversal of 1221102210212 is 2120122011221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6636424964 + ... + 6636425147.

It is an arithmetic number, because the mean of its divisors is an integer number (185819901568).

Almost surely, 2^{1221102210212} is an apocalyptic number.

It is an amenable number.

1221102210212 is a deficient number, since it is larger than the sum of its proper divisors (1008736608604).

1221102210212 is a wasteful number, since it uses less digits than its factorization.

1221102210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13272850138 (or 13272850136 counting only the distinct ones).

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

Adding to 1221102210212 its reverse (2120122011221), we get a palindrome (3341224221433).

The spelling of 1221102210212 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred ten thousand, two hundred twelve".