12011122101211 has 4 divisors (see below), whose sum is σ = 12015552617424. Its totient is φ = 12006691585000.

The previous prime is 12011122101197. The next prime is 12011122101221. The reversal of 12011122101211 is 11210122111021.

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 12011122101211 - 2⁹ = 12011122100699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011122101221) 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, 2215254040 + ... + 2215259461.

It is an arithmetic number, because the mean of its divisors is an integer number (3003888154356).

Almost surely, 2^{12011122101211} is an apocalyptic number.

12011122101211 is a deficient number, since it is larger than the sum of its proper divisors (4430516213).

12011122101211 is an equidigital number, since it uses as much as digits as its factorization.

12011122101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430516212.

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

Adding to 12011122101211 its reverse (11210122111021), we get a palindrome (23221244212232).

The spelling of 12011122101211 in words is "twelve trillion, eleven billion, one hundred twenty-two million, one hundred one thousand, two hundred eleven".