11221221201222 has 64 divisors (see below), whose sum is σ = 25013929870080. Its totient is φ = 3335008951296.

The previous prime is 11221221201199. The next prime is 11221221201227. The reversal of 11221221201222 is 22210212212211.

It is a super-2 number, since 2×11221221201222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221221201227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112639098 + ... + 112738674.

It is an arithmetic number, because the mean of its divisors is an integer number (390842654220).

Almost surely, 2^{11221221201222} is an apocalyptic number.

11221221201222 is an abundant number, since it is smaller than the sum of its proper divisors (13792708668858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221221201222 is a wasteful number, since it uses less digits than its factorization.

11221221201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157765.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11221221201222 its reverse (22210212212211), we get a palindrome (33431433413433).

The spelling of 11221221201222 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-two".