12212221221101 has 16 divisors (see below), whose sum is σ = 13413226147200. Its totient is φ = 11026365583680.

The previous prime is 12212221221059. The next prime is 12212221221103. The reversal of 12212221221101 is 10112212221221.

It is a cyclic number.

It is not a de Polignac number, because 12212221221101 - 2¹⁸ = 12212220958957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212221221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15626675 + ... + 16389551.

It is an arithmetic number, because the mean of its divisors is an integer number (838326634200).

Almost surely, 2^{12212221221101} is an apocalyptic number.

12212221221101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212221221101 is a deficient number, since it is larger than the sum of its proper divisors (1201004926099).

12212221221101 is a wasteful number, since it uses less digits than its factorization.

12212221221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772804.

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

Adding to 12212221221101 its reverse (10112212221221), we get a palindrome (22324433442322).

It can be divided in two parts, 12212221221 and 101, that multiplied together give a palindrome (1233434343321).

The spelling of 12212221221101 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred one".