12021220101211 has 4 divisors (see below), whose sum is σ = 12023792590392. Its totient is φ = 12018647612032.

The previous prime is 12021220101203. The next prime is 12021220101221. The reversal of 12021220101211 is 11210102212021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021220101211 - 2³ = 12021220101203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021220101221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286237581 + ... + 1286246926.

It is an arithmetic number, because the mean of its divisors is an integer number (3005948147598).

Almost surely, 2^{12021220101211} is an apocalyptic number.

12021220101211 is a deficient number, since it is larger than the sum of its proper divisors (2572489181).

12021220101211 is an equidigital number, since it uses as much as digits as its factorization.

12021220101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572489180.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12021220101211 its reverse (11210102212021), we get a palindrome (23231322313232).

The spelling of 12021220101211 in words is "twelve trillion, twenty-one billion, two hundred twenty million, one hundred one thousand, two hundred eleven".