11221221012212 has 48 divisors (see below), whose sum is σ = 20532255058560. Its totient is φ = 5355850211712.

The previous prime is 11221221012179. The next prime is 11221221012223. The reversal of 11221221012212 is 21221012212211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313450298 + ... + 313486094.

It is an arithmetic number, because the mean of its divisors is an integer number (427755313720).

Almost surely, 2^{11221221012212} is an apocalyptic number.

It is an amenable number.

11221221012212 is a deficient number, since it is larger than the sum of its proper divisors (9311034046348).

11221221012212 is a wasteful number, since it uses less digits than its factorization.

11221221012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42600 (or 42598 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11221221012212 its reverse (21221012212211), we get a palindrome (32442233224423).

The spelling of 11221221012212 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twelve thousand, two hundred twelve".