20121101211211 has 32 divisors (see below), whose sum is σ = 27045531330048. Its totient is φ = 14456762807040.

The previous prime is 20121101211161. The next prime is 20121101211241. The reversal of 20121101211211 is 11211210112102.

It is a cyclic number.

It is not a de Polignac number, because 20121101211211 - 2¹⁷ = 20121101080139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121101211241) 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, 10173130 + ... + 11988943.

It is an arithmetic number, because the mean of its divisors is an integer number (845172854064).

Almost surely, 2^{20121101211211} is an apocalyptic number.

20121101211211 is a deficient number, since it is larger than the sum of its proper divisors (6924430118837).

20121101211211 is a wasteful number, since it uses less digits than its factorization.

20121101211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22163011.

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

Adding to 20121101211211 its reverse (11211210112102), we get a palindrome (31332311323313).

The spelling of 20121101211211 in words is "twenty trillion, one hundred twenty-one billion, one hundred one million, two hundred eleven thousand, two hundred eleven".