12011202022221 has 12 divisors (see below), whose sum is σ = 17387148558780. Its totient is φ = 7990098233280.

The previous prime is 12011202022213. The next prime is 12011202022247. The reversal of 12011202022221 is 12222020211021.

It is a happy number.

12011202022221 is a `hidden beast` number, since 120 + 1 + 120 + 202 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2191214075625 + 9819987946596 = 1480275^2 + 3133686^2 .

It is not a de Polignac number, because 12011202022221 - 2³ = 12011202022213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011202022194 and 12011202022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011202022321) 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 11 ways as a sum of consecutive naturals, for example, 1447477416 + ... + 1447485713.

It is an arithmetic number, because the mean of its divisors is an integer number (1448929046565).

Almost surely, 2^{12011202022221} is an apocalyptic number.

It is an amenable number.

12011202022221 is a deficient number, since it is larger than the sum of its proper divisors (5375946536559).

12011202022221 is a wasteful number, since it uses less digits than its factorization.

12011202022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894963596 (or 2894963593 counting only the distinct ones).

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

Adding to 12011202022221 its reverse (12222020211021), we get a palindrome (24233222233242).

The spelling of 12011202022221 in words is "twelve trillion, eleven billion, two hundred two million, twenty-two thousand, two hundred twenty-one".