12222012100221 has 128 divisors (see below), whose sum is σ = 23258924236800. Its totient is φ = 6159013217280.

The previous prime is 12222012100187. The next prime is 12222012100289. The reversal of 12222012100221 is 12200121022221.

It is a happy number.

12222012100221 is a `hidden beast` number, since 1 + 222 + 201 + 21 + 0 + 0 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12222012100221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222012100194 and 12222012100203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222012100621) 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 127 ways as a sum of consecutive naturals, for example, 10488115 + ... + 11595023.

It is an arithmetic number, because the mean of its divisors is an integer number (181710345600).

Almost surely, 2^{12222012100221} is an apocalyptic number.

12222012100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222012100221 is a deficient number, since it is larger than the sum of its proper divisors (11036912136579).

12222012100221 is a wasteful number, since it uses less digits than its factorization.

12222012100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107096 (or 1107090 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12222012100221 its reverse (12200121022221), we get a palindrome (24422133122442).

The spelling of 12222012100221 in words is "twelve trillion, two hundred twenty-two billion, twelve million, one hundred thousand, two hundred twenty-one".