12121011101211 has 32 divisors (see below), whose sum is σ = 16308956160000. Its totient is φ = 8007035452416.

The previous prime is 12121011101209. The next prime is 12121011101219. The reversal of 12121011101211 is 11210111012121.

It is not a de Polignac number, because 12121011101211 - 2¹ = 12121011101209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121011101219) 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, 1445209960 + ... + 1445218346.

It is an arithmetic number, because the mean of its divisors is an integer number (509654880000).

Almost surely, 2^{12121011101211} is an apocalyptic number.

12121011101211 is a deficient number, since it is larger than the sum of its proper divisors (4187945058789).

12121011101211 is a wasteful number, since it uses less digits than its factorization.

12121011101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12121011101211 its reverse (11210111012121), we get a palindrome (23331122113332).

It can be divided in two parts, 1 and 2121011101211, that added together give a palindrome (2121011101212).

The spelling of 12121011101211 in words is "twelve trillion, one hundred twenty-one billion, eleven million, one hundred one thousand, two hundred eleven".