12021221210211 has 64 divisors (see below), whose sum is σ = 18880155993600. Its totient is φ = 7538394729600.

The previous prime is 12021221210203. The next prime is 12021221210291. The reversal of 12021221210211 is 11201212212021.

12021221210211 is a `hidden beast` number, since 1 + 2 + 0 + 21 + 221 + 210 + 211 = 666.

It is not a de Polignac number, because 12021221210211 - 2³ = 12021221210203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021221210291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49499821 + ... + 49742081.

It is an arithmetic number, because the mean of its divisors is an integer number (295002437400).

Almost surely, 2^{12021221210211} is an apocalyptic number.

12021221210211 is a deficient number, since it is larger than the sum of its proper divisors (6858934783389).

12021221210211 is a wasteful number, since it uses less digits than its factorization.

12021221210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242977 (or 242971 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12021221210211 its reverse (11201212212021), we get a palindrome (23222433422232).

The spelling of 12021221210211 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred eleven".