20121100211211 has 16 divisors (see below), whose sum is σ = 27040544223264. Its totient is φ = 13308277181184.

The previous prime is 20121100211171. The next prime is 20121100211221. The reversal of 20121100211211 is 11211200112102.

It is a happy number.

It is not a de Polignac number, because 20121100211211 - 2¹⁷ = 20121100080139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121100211221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51765856 + ... + 52153101.

It is an arithmetic number, because the mean of its divisors is an integer number (1690034013954).

Almost surely, 2^{20121100211211} is an apocalyptic number.

20121100211211 is a deficient number, since it is larger than the sum of its proper divisors (6919444012053).

20121100211211 is a wasteful number, since it uses less digits than its factorization.

20121100211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103919470.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20121100211211 its reverse (11211200112102), we get a palindrome (31332300323313).

The spelling of 20121100211211 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, two hundred eleven thousand, two hundred eleven".