12021212111211 has 32 divisors (see below), whose sum is σ = 18423875995200. Its totient is φ = 7737555490560.

The previous prime is 12021212111189. The next prime is 12021212111221. The reversal of 12021212111211 is 11211121212021.

It is a happy number.

12021212111211 is a `hidden beast` number, since 120 + 2 + 121 + 211 + 1 + 211 = 666.

It is not a de Polignac number, because 12021212111211 - 2⁶ = 12021212111147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021212111221) 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, 27530551 + ... + 27963791.

It is an arithmetic number, because the mean of its divisors is an integer number (575746124850).

Almost surely, 2^{12021212111211} is an apocalyptic number.

12021212111211 is a deficient number, since it is larger than the sum of its proper divisors (6402663883989).

12021212111211 is a wasteful number, since it uses less digits than its factorization.

12021212111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468716 (or 468710 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12021212111211 its reverse (11211121212021), we get a palindrome (23232333323232).

The spelling of 12021212111211 in words is "twelve trillion, twenty-one billion, two hundred twelve million, one hundred eleven thousand, two hundred eleven".